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]: Carrie was much faster with tying knots than Samantha because _ had very nimble hands. (A) Carrie (B) Samantha
[EX A]: A

[EX Q]: Kyle was listening to Ian tell him about these vitamins he was taking.  _ was cheerful about them. (A) Kyle (B) Ian
[EX A]: B

[EX Q]: The black ox can carry a heavier load than the brown ox due to the lighter muscle mass of the _ ox. (A) black (B) brown
[EX A]:
B