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".

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

Ex Output:
B


Ex Input:
The whole feed from the box cannot be emptied into the bowl because the _ is too small. (A) bowl (B) box

Ex Output:
A


Ex Input:
The many found many aquamarine gemstones in the mine, but very few gold nuggets since the _ were rare. (A) gemstones (B) nuggets

Ex Output:

B