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").

[EX Q]: Fact1: Urine is the liquid waste product of the body that is excreted by the urinary system., Fact2: Mammals excrete urea in the watery form of urine ., Question: What is a waste product of the body that is excreted by the urinary system? (A) potash (B) food (C) CO 2 (D) sugar (E) urea (F) liquid (G) H 2 O (H) sulfur
[EX A]: E

[EX Q]: Fact1: building housing developments usually requires replacing animal habitats, Fact2: Habitat destruction is the primary cause of extinction or threat of extinction for all animals., Question: Building housing developments may cause  (A) eruptions (B) colder weather (C) disease (D) erosion (E) extinction (F) mutations (G) Destroy bridges (H) deforestation
[EX A]: E

[EX Q]: Fact1: Heterotrophs are living things that cannot make their own food., Fact2: All animals are heterotrophic., Question: What cannot make their own food? (A) parasites (B) animals (C) producers (D) fungi (E) bacteria (F) phytoplankton (G) plants (H) humans
[EX A]:
B