People who _____ have been found to be far less likely to develop memory problems in old age.

• A. take vitamins
• B. exercise their mental abilities
• C. exercise regularly
• D. consistently get eight hours of sleep each night

Answer: (B)

Verified step by step guidance

1. Identify the key concept being tested in the question, which is the prevention of memory problems in old age.
2. Consider the options provided: taking vitamins, exercising mental abilities, exercising regularly, and getting eight hours of sleep each night.
3. Reflect on psychological research related to cognitive health and aging, particularly studies on neuroplasticity and cognitive reserve.
4. Understand that exercising mental abilities, such as engaging in activities that challenge the brain, is linked to maintaining cognitive function and reducing the risk of memory problems.
5. Conclude that the option 'exercise their mental abilities' aligns with psychological findings on maintaining cognitive health in old age.