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: when an electrical circuit is working properly , electrical current runs through that circuit, Fact2: An electric current is then used to burn the tumor away., Question: When the electrical circuit is working properly, what can happen? (A) dogs can run (B) heat production (C) enormous damage to homes (D) a tumor can be burned away (E) massive damage (F) sperm and egg fuse (G) baskets can be hand-woven (H) bacteria can thrive
[EX A]: D

[EX Q]: Fact1: Aging is associated with the death of cells., Fact2: If cell death occurs it is called infarction ., Question: What is aging associated with? (A) rapid expansion (B) massive damage (C) burning coal (D) Smoking (E) energy usage (F) It decreases (G) infarction (H) smoking tobacco
[EX A]:
G