Given the task definition and input, reply with output. 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.

Sentence: When Nick put the chicken thighs into the freezer bag, he could bend them almost in half and they bounced back into position. When he pulled them out and tried bending one, it broke. Question: Why? (A) a frozen chicken thigh is less flexible (B) a fresh chicken thigh is more flexible
a fresh chicken thigh is more flexible