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".

[EX Q]: It was Tanya's turn to clean the bathtub and Natalie's turn to clean the sink. _ was obligated to clean the bathtub. (A) Tanya (B) Natalie
[EX A]: A

[EX 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
[EX A]: B

[EX Q]: Benjamin screamed at Ryan because _ was so upset about the mother-in-law coming for a visit. (A) Benjamin (B) Ryan
[EX A]:
A