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]: I rubbed sandpaper on the wood. (A) The wood became smooth. (B) The wood became sticky., Question: effect
[EX A]: A

[EX Q]: I poured water on my sleeping friend. (A) My friend awoke. (B) My friend snored., Question: effect
[EX A]: A

[EX Q]: A water pipe in the house burst. (A) The water was unsanitary. (B) The pipe froze., Question: cause
[EX A]:
B