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".

Example Input: The carpenter wanted to build a wall, but he didn't have enough bricks. He built a water well instead because the _ required too many bricks. (A) water well (B) wall
Example Output: B

Example Input: In order to call his mom, he bought a landline and cell phone. The _ was more beneficial because it was mobile. (A) cell phone (B) landline
Example Output: A

Example Input: Rachel played in the swimming pool while Jessica jumped in the muddy puddle. _ was still clean when they returned home. (A) Rachel (B) Jessica
Example Output:
A