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".

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

Matthew is a public health expert, Justin is not therefore _ would not be best at explaining the danger of mold. (A) Matthew (B) Justin
B

The fingers of Kenneth were bleeding, so Dennis took a look at them, because _ is a physician. (A) Kenneth (B) Dennis

B