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".

The man wrote letters in the Army, but didn't send packages. That's because it is expensive to send _ . (A) letters (B) packages
B

Tina made a schedule to keep track of her work and school obligations.  She preferred to focus on the _ because she wanted to learn. (A) school (B) work
A

Leslie was able to jump to the top of the wall while leaving Brian behind because _ is tall. (A) Leslie (B) Brian

A