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]: Sarah took their bird to Rachel at the vet office, but _ thought their bird was acting normally. (A) Sarah (B) Rachel
[A]: B


[Q]: Julie poured the entire bottle of liquid soup into the pan on the stove until the _ was full. (A) pan (B) bottle
[A]: A


[Q]: I wrote a few letters and sent them to three universities, but they weren't received because the _ were lost. (A) universities (B) letters
[A]:
B