In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".

[Q]: Derrick took a small loan from William, so _ made sure to pay them back on time. (A) Derrick (B) William
[A]: A

[Q]: Megan asked Elena what time she had to go to the doctor but _ forgot what time the appointment was. (A) Megan (B) Elena
[A]: B

[Q]: The trumpet 's wail filled the hall, but was silent in the auditorium, as the _ was exposed to the noise. (A) hall (B) auditorium
[A]:
A