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: wind and rain cause erosion, Fact2: Water, in the form of rain, is the most effective agent of erosion., Question: What causes erosion the most? (A) streams (B) motion (C) LEDs (D) water (E) Roads (F) rivers (G) Winter (H) wind
[EX A]: D

[EX Q]: Fact1: poisonous darts are used for defense by sea anemones, Fact2: Sea anemones are related to jellyfish and coral., Question: what are used for defense by an organism related to jellyfish and coral (A) poisonous darts (B) Chemicals (C) specialized (D) by parasitizing them (E) chondrocytes (F) flagella (G) Microscopic vessels. (H) a sponge
[EX A]: A

[EX Q]: Fact1: Feathers help birds fly and provide insulation., Fact2: Class Aves is for the birds, literally., Question: Feathers help what kind of animals fly and provide insulation? (A) preventing heat transfer (B) dragons (C) passenger pigeons (D) butterflies (E) animals in the class Aves (F) airplanes (G) it protects them (H) retaining heat
[EX A]:
E