A.I. Explanation:

Option 1: "The brain is designed to enable quick decision making."

Explanation: The text states that the brain evolved to help us think on our feet, which supports the idea that it is designed for quick decision making. This aligns with the main idea that people can make correct judgments under pressure.

Option 2: "Quick decision making can be improved."

Explanation: The passage mentions that we can learn to make better snap judgments, indicating that quick decision making can indeed be improved. This is directly supported by the author's argument about learning to enhance our judgment skills.

Option 3: "Quick decision making routinely leads to error."

Explanation: This option contradicts the text, which states that people often make correct judgments even under pressure. Therefore, it misrepresents the author's point about the effectiveness of quick decision making.

Option 4: "To make correct decisions we require all relevant information."

Explanation: The text suggests that people can make correct judgments with limited information, which contradicts this option. It implies that having all relevant information is not a necessity for making correct decisions.

Option 5: "Thinking things through thoroughly will lead to greater success."

Explanation: The passage argues that thinking long and hard does not always yield better results, which directly opposes this statement. It indicates that thorough thinking is not necessarily linked to greater success in decision making.