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 artist finished her painting before the cook finished her tart because the _ was slow to complete. (A) tart (B) painting
[EX A]: A

[EX Q]: Katrina trained Tanya to do aerobic exercise because _ was a trainer in great shape. (A) Katrina (B) Tanya
[EX A]: A

[EX Q]: Ian gave a beautiful pine mirror to Dennis as a gift because today was _ 's birthday. (A) Ian (B) Dennis
[EX A]:
B