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

Fact1: Organs of excretion make up the excretory system., Fact2: Excess estrogen is excreted in the bowel., Question: what helps make up the excretory system? (A) sugar (B) gills (C) h2o (D) lungs (E) aorta (F) bowel (G) fungi (H) honey
F