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: cold fronts cause thunderstorms as they pass by, Fact2: Thunderstorms create havoc., Question: What do cold fronts cause? (A) death (B) complex (C) wind (D) streams (E) deadly (F) disease (G) havoc (H) mildew
[A]: G

[Q]: Fact1: Corals form large colonies in shallow tropical water., Fact2: Corals are tiny flower-like animals that live in colonies., Question: Where do flower-like animals live? (A) Hot waters (B) Cold waters (C) Chlorophyll (D) loose soil (E) Shallow waters (F) our planet (G) the environment (H) Deep waters
[A]: E

[Q]: Fact1: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Erosion was monitored by means of erosion pins., Question: How do we track canyon changes? (A) LEDs (B) wind (C) forces (D) river (E) slow (F) Pins (G) Raft (H) three
[A]:
F