In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: Urine leaves the body through a sphincter in the process of urination., Fact2: Elimination of urine is normally a voluntary process for adults., Question: Urine leaves the body through voluntary elimination for adults? (A) forceful pressure (B) hostile elimination (C) voluntary elimination (D) Converting waste. (E) solid, liquid, gas (F) violent churning (G) It helps them survive (H) By wind and rain
A:
C