TASK DEFINITION: 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".
PROBLEM: Derrick took a small loan from William, so _ made sure to pay them back on time. (A) Derrick (B) William

SOLUTION: A

PROBLEM: Mary gave a framed picture as a gift to Amy because _ was invited to her birthday party. (A) Mary (B) Amy

SOLUTION: A

PROBLEM: Ian spent half an hour cracking Joseph's back and neck, because _ was a paying customer. (A) Ian (B) Joseph

SOLUTION:
B