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".

Michael smelled much better than Christopher did although _ had just taken a long shower. (A) Michael (B) Christopher
B

The house owned by Rebecca looked worse than the one of Natalie because _ took care of their bushes. (A) Rebecca (B) Natalie
B

Katrina asked Rachel to change the diapers for the babies this morning because _ isn't doing anything. (A) Katrina (B) Rachel

B