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: Jenny found that using peroxide instead of toothpaste on her teeth gave her a better smile, because with _ her teeth were browner. (A) peroxide (B) toothpaste

A: B
****
Q: I was making a voodoo doll with stuffing and a needle, but needed to switch to a thicker needle since the _ was thin. (A) stuffing (B) needle

A: B
****
Q: Kevin was worried about Eric's infections so _ decided to go to an emergency clinic. (A) Kevin (B) Eric

A:
B
****