Section: Listening Part C

50)

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Listen to the audio and answer the question.

1. Patient's genetic disposition
2. Treatments for degenerative brain disorders
3. Alzheimer's disease
4. The elderly population

This is the main idea question. Most of the talk gives information about the causes and effects of Alzheimer's disease; therefore, (C) is the correct choice.

(B) is incorrect because the talk does not mention treatments of degenerative brain disorders. (A) and (D) are supporting details and too specific to qualify for the main idea.