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: matter vibrating can cause sound, Fact2: All matter emits vibrations., Question: What kind of matter can produce sound? (A) sensory neurons (B) all matter (C) an object (D) only liquids (E) mechanical (F) only plasma (G) only solids (H) waves
[EX A]: B

[EX Q]: Fact1: when the seasons change from the summer to the fall , the amount of daylight will decrease, Fact2: Daylight, sunlight, is necessary to it., Question: When the seasons change from the summer to the fall, the amount of what will decrease? (A) air (B) matter (C) Energy. (D) Solar energy (E) Light (F) sunlight (G) energy (H) planets
[EX A]: F

[EX Q]: Fact1: poisonous darts are used for defense by sea anemones, Fact2: Anthozoans are the familiar anemones and corals., Question: What are used for defense by Anthozoans? (A) antigens (B) poisonous darts (C) unicellular organisms (D) Chemicals (E) paramecium (F) antibodies (G) hardened backbone (H) feed on dead protists
[EX A]:
B