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: Evolution is a change in the characteristics of living things over time., Fact2: Trees are the largest of living things., Question: Evolution changes the characteristics of what over time? (A) the Moon (B) Man (C) life (D) trees (E) rocks (F) the Sun (G) humans (H) plants
[EX A]: D

[EX Q]: Fact1: Temperature falls from lower to higher altitudes., Fact2: If the weather is warm, their temperature rises., Question: What falls from lower to higher altitudes? (A) warm weather (B) sun's heat (C) rainfall (D) heat energy (E) kinetic energy (F) water vapor (G) colder and wetter (H) Greenhouse gasses
[EX A]: A

[EX Q]: Fact1: Bivalves feed on plankton and nonliving organic matter., Fact2: Most animals that live on rocky shores eat plankton., Question: Most animals that live on rocky shores eat what? (A) after too much water received (B) scarce resources (C) nonliving organic matter (D) mammals (E) Something made from fermented ricce (F) large animals (G) birds (H) harmful substances
[EX A]:
C