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".

[Q]: Aaron went to pick up Michael, who needed a ride to the airport, and _ was very grateful. (A) Aaron (B) Michael
[A]: B


[Q]: I prefer the new space right next to my house than the old spot downtown because the _ is near. (A) space (B) spot
[A]: A


[Q]: Ryan's fish tank looks really clean, and Nelson's looks really dirty because _ cleans regularly. (A) Ryan (B) Nelson
[A]:
A