Detailed Instructions: 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 is the liquid waste product of the body that is excreted by the urinary system., Fact2: Nitrogenous wastes leave the body in the urine., Question: How are nitrogenous wastes excreted? (A) solutes (B) wetland (C) salmon (D) urine (E) soil (F) harmful (G) gills (H) CO 2
A:
D