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".

The girl came across an unfamiliar word in her textbook. (A) She looked the term up in the dictionary. (B) She chucked the textbook across the room., Question: effect
A