A.I. Explanation:

Question Focus: Detail question - checking whether medical treatment is mentioned

Correct Answer: A

Passage Reference: Four factors were found to be related to their mental fitness: levels of education and physical activity, lung function, and feelings of self-efficacy "Each of these elements alters the way our brain functions, " says Marilyn Albert, Ph.D. , of Harvard Medical School, and colleagues from Yale, Duke, and Brandeis Universities and the Mt. Sinai School of Medicine, who hypothesizes that regular exercise may actually stimulate blood flow to the brain and nerve growth, both of which create more densely branched neurons, rendering the neurons stronger and better able to resist disease.

Why this is correct: This option is wrong because the passage never talks about medical treatment or preventive medicine for Alzheimer's disease. It only discusses lifestyle and personal factors that help the brain stay strong. This is a Not Given trap.

Tips: Do not choose answers based on medical knowledge. Only choose what is clearly written in the passage.

Question Focus: Detail question - identifying physical activity that helps brain function

Correct Answer: B

Passage Reference: Moderate aerobic exercise, including long brisk walks and frequently climbing stairs, will accomplish this.

Why this is correct: This is correct because the passage clearly says that moderate aerobic exercise, such as long brisk walks and frequently climbing stairs, improves brain function by strengthening neurons.

Paraphrasing: Passage: 'Moderate aerobic exercise ... frequently climbing stairs' = Option: 'Doing active aerobic exercise and frequently climbing stairs'

Tips: When an option repeats examples from the passage, double-check the meaning. Here, it matches exactly.

Key Vocabulary:

• aerobic = related to exercise using oxygen

Question Focus: Detail question - checking the role of education

Correct Answer: C

Passage Reference: Education also seems to enhance brain function. People who have challenged themselves with at least a college education may actually stimulate the neurons in their brains.

Why this is correct: This option is correct because the passage directly states that education enhances brain function and can stimulate the neurons in the brain.

Paraphrasing: Passage: 'Education also seems to enhance brain function' = Option: 'High levels of education'

Tips: Simple statements like this are often correct when the wording closely follows the passage.

Key Vocabulary:

• enhance = improve

Question Focus: Detail question - early abilities affecting brain health

Correct Answer: D

Passage Reference: Early linguistic ability also seems to help our brains later in life. A recent study in the New England Journal of Medicine looked at 93 elderly nuns and examined the autobiographies they had written 60 years earlier, just as they were joining a convent. The nuns whose essays were complex and dense with ideas remained sharp into their eighties and nineties.

Why this is correct: This is correct because the passage explains that early linguistic ability helps the brain later in life, shown by the study of the nuns who stayed mentally sharp.

Paraphrasing: Passage: 'Early linguistic ability also seems to help our brains later in life' = Option: 'Early verbal or language competence training'

Tips: Watch for synonyms like linguistic and verbal. Different words, same meaning.

Key Vocabulary:

• linguistic = related to language

Question Focus: Detail question - checking for supplements

Correct Answer: E

Passage Reference: Four factors were found to be related to their mental fitness: levels of education and physical activity, lung function, and feelings of self-efficacy

Why this is correct: This option is wrong because the passage never mentions supplements, herbs, or ginkgo. This is based on outside knowledge, not the text. That makes it a Not Given trap.

Tips: If something sounds scientific but is not written in the passage, do not choose it.

Question Focus: Detail question - emotional and psychological factors

Correct Answer: F

Passage Reference: Four factors were found to be related to their mental fitness: levels of education and physical activity, lung function, and feelings of self-efficacy

Why this is correct: This option is correct because the passage explicitly lists feelings of self-efficacy as one of the four factors related to mental fitness. Self-efficacy is closely linked to feelings of self-fulfillment.

Paraphrasing: Passage: 'feelings of self-efficacy' = Option: 'feelings of self-fulfillment'

Tips: Abstract words are often paraphrased. Focus on meaning, not exact wording.

Key Vocabulary:

• self-efficacy = belief in your own ability

General Tips:

• For multiple-answer questions, first find how many answers you need. Here, you need FOUR.
• Underline the list in the passage. Lists often give you direct answers.
• Only Matching Features can jump around the passage. MCQ answers follow passage order.
• Do not use real-world knowledge. Use only what the passage states.