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".

[Q]: The dog barked. (A) The cat lounged on the couch. (B) A knock sounded at the door., Question: cause
[A]: B


[Q]: The balloon expanded. (A) I blew into it. (B) I pricked it., Question: cause
[A]: A


[Q]: The girl went down the hill on her bike. (A) Her bike swerved. (B) Her bike sped up., Question: effect
[A]:
B