Detailed Instructions: You are given a sentence, a question and two answer options. Your task is to write down the index ('A' or 'B') of the **incorrect** option for the given question.
Q: Sentence: Mary was bending objects to see which would break easier. She bent a plastic sheet and it didn't break, but she bent a glass sheet and it broke right away. Question: Which sheet was more flexible? (A) plastic sheet (B) glass sheet
A:
B