Definition: You are given a question on nutrition. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Which of these factors is associated with an increase in the risk for prostate cancer?

(A)Insulin-like growth factor-1 (B)Dietary fat (C)Alcohol (D)Salt

A