Teacher:You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Teacher: Now, understand the problem? Solve this instance: Sentence: Mike's glass sheet is very brittle, while his phone book is pretty flexible. Question: Which item is more likely to break in two when he flexes it? (A) phone book (B) glass sheet
Student:
glass sheet