Question

which sentence from the text explains why marie chose to study chemistry?
she wanted to fulfill his dream, which had become her own.
she commuted from home to school to help save money.
... marie enrolled in queens college in new york and focused on the study of chemistry.
dr. caldwell had a keen interest in body chemistry and how the body digests food.

Explanation:

The first option indicates that Marie chose to study chemistry because it was her father's (Dr. Caldwell, as implied by the context) dream that became hers. The second option is about saving money (not related to the reason for choosing chemistry). The third option just states she enrolled and focused on chemistry (not the reason). The fourth option is about Dr. Caldwell's interest but doesn't directly say it's the reason Marie chose chemistry. The first option clearly gives a reason related to fulfilling a dream (which would be a motivation for her choice).

Answer:

She wanted to fulfill his dream, which had become her own.