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 Q]: The medical exam for the broken arm was longer than the exam on the heart because the _ was a serious problem. (A) heart (B) arm
[EX A]: B

[EX Q]: Adam is getting full immunity during the trial but not Robert because _ is keeping quiet.. (A) Adam (B) Robert
[EX A]: B

[EX Q]: Ryan was fit and ran around the field far in front of Joel _ was in disbelief. (A) Ryan (B) Joel
[EX A]:
B