A.I. Explanation:

Option 1: "People tend to forget what they have read more quickly."

Explanation: This option is incorrect because the text does not mention anything about forgetting what has been read. Instead, it focuses on the inability to grasp the full process of thought in longer texts, which is a different issue.

Option 2: "People are more likely to accept incorrect information without checking it."

Explanation: This option is incorrect as the text does not address the acceptance of incorrect information. The focus is on the negative impact of skim reading on comprehension rather than on verifying information.

Option 3: "People have less conscious control over their mental processes."

Explanation: This option is incorrect because the text does not explicitly state that people have less conscious control over their mental processes. It emphasizes the need to cultivate a reading brain for deeper engagement with texts.

Option 4: "People are less able to follow the argument of complex texts."

Explanation: This option is correct as the text states that the new reading norm leads to a decrease in proficiency in grasping the full process of thought in longer, more demanding material. This directly relates to the inability to follow complex arguments.