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: Nick asked Christopher how to focus a camera, since _ had never been able to get the hang of that. (A) Nick (B) Christopher

A: A
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Q: Her boyfriend regretted buying her a jacket and got her a new hat instead, as he knew she thought the _ was a perfect match for her wardrobe. (A) jacket (B) hat

A: B
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Q: Justin gave a ultrasound to Donald because _ was concerned about their patients comments about stomach pain. (A) Justin (B) Donald

A:
A
****