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:
Kylie had her mind set on seeing Venice by boat, but she was in a hurry so she saw it by trolley since the _ was fast. (A) trolley (B) boat

Ex Output:
A

Ex Input:
Matthew called the police because Samuel was having a loud party. The police said it wasn't their jurisdiction and this made _ feel relieved. (A) Matthew (B) Samuel

Ex Output:
B

Ex Input:
We had to throw out the soap and use acid, as the _ was ineffective in removing the bloodstains. (A) soap (B) acid

Ex Output:
A