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: a greenhouse is used to protect plants from the cold, Fact2: Plants are very easily raised from seed, sown in a cold greenhouse from February to April., Question: What does a greenhouse protect plants from to help them grow easily? (A) death (B) hotness (C) Winter (D) fronts (E) heat (F) drought (G) rain (H) chill
[EX A]: H

[EX Q]: Fact1: friction causes the temperature of an object to increase, Fact2: Friction Rubbing an object on another object can produce friction., Question: what does rubbing an object on another object cause that object to do? (A) heat production (B) heat is produced (C) sandpaper (D) It gets heated up (E) decrease in temperature (F) explode (G) heat the body (H) increase in temperature
[EX A]: H

[EX Q]: Fact1: high mountains with well-rounded peaks can be formed by collision of crustal plates, Fact2: Plate Tectonics is the study of crustal plates and their boundaries., Question: high mountains with well-rounded peaks can be formed by collision of what? (A) plate tectonics (B) unicellular organisms (C) islets of Langerhans (D) changes in size (E) deposits (F) permeable walls (G) trucks and cars (H) rapid changes occur
[EX A]:
A