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: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: Heat energy is measured in calories., Question: Calories measure the energy that leaves a gas to form what? (A) nutrients (B) burning (C) warmth (D) H20 (E) ligt (F) liquid (G) store (H) movement
[EX A]: F

[EX Q]: Fact1: being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time, Fact2: Well, a swamp is a type of wetland., Question: where does being buried under soil and mud change peat into coal through extreme heat and pressure over a long period of time? (A) watershed (B) alluvial (C) wetland (D) deltas (E) erosion (F) houses (G) earth (H) lakes
[EX A]: C

[EX Q]: Fact1: Ethologists usually study how animals behave in their natural environment., Fact2: Animals behave according to instinct., Question: Ethologists study how animals use what in their natural environment (A) Energy (B) Chlorophyll (C) fur (D) digestion (E) instincts (F) lungs (G) an object (H) Energy.
[EX A]:
E