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: melting means changing from a solid into a liquid by adding heat energy, Fact2: Ice is the solid form of water., Question: What changes ice to water by adding heat energy? (A) mussels (B) melting (C) freezing (D) fertilization (E) storms (F) boiling (G) engines (H) condensation
[EX A]: B

[EX Q]: Fact1: if soil is permeable then water easily flows through that soil, Fact2: Sandy soils are permeable., Question: Water easily flows through what? (A) streams. (B) streams (C) coral reefs (D) sandy soils (E) aqueous solution (F) swamp vegetation (G) calcite (H) Sediment
[EX A]: D

[EX Q]: Fact1: water vapor cooling causes that water vapor to condense, Fact2: Clouds form by the condensation of water vapor., Question: What can form when water vapor cools? (A) Chimneys (B) Evaporation (C) chemicals (D) streams (E) Wind (F) Organic nutrients (G) Clouds (H) mildew
[EX A]:
G