Question

12 mark for review the hippocampus is one of the major components of the human brain. when people suffer from alzheimers disease and other forms of dementia, the hippocampus is often the first area of the brain to display damage. the most common symptoms of early - stage alzheimers disease are short - term memory loss, difficulty learning new information, and disorientation, suggesting that
which choice most logically completes the text?
a the hippocampus plays a role in forming short - term memories and retaining new information.
b alzheimers disease is primarily diagnosed by examining a patients hippocampus.
c people whose hippocampi are not damaged will not experience short - term memory loss.
d many parts of the brain are affected by alzheimers disease.

Explanation:

The text states that when the hippocampus is damaged (as in Alzheimer's and dementia), symptoms like short - term memory loss and difficulty learning new info occur. So, it can be inferred that the hippocampus is related to these functions.

• Option A: Logically connects the hippocampus (which is damaged in the described cases) to short - term memory and retaining new info (the symptoms).
• Option B: The text is about symptoms related to the hippocampus, not about diagnosis methods.
• Option C: The text only talks about what happens when the hippocampus is damaged, not about what happens when it is not damaged. It's an over - generalization.
• Option D: The text focuses on the hippocampus, not on multiple brain parts affected by Alzheimer's.

Answer:

A. the hippocampus plays a role in forming short - term memories and retaining new information.