In this task, you are given a premise sentence, two possible options and a question word. If the question was cause you should select the option that is a possible cause of the premise sentence, and if the question word was effect you should find the option which is a possible effect of the premise sentence. Answer with "A" or "B".

[EX Q]: The man grieved. (A) His wife criticized him. (B) His mother passed away., Question: cause
[EX A]: B

[EX Q]: I pushed the pendulum. (A) It slowed to a stop. (B) It swung back and forth., Question: effect
[EX A]: B

[EX Q]: The librarian located the book in the stacks. (A) I requested the librarian's help. (B) The book was checked out., Question: cause
[EX A]:
A