instruction:
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").
question:
Fact1: Evolution occurs in response to a change in the environment., Fact2: Extinction is a natural part or the process of evolution., Question: What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery
answer:
B


question:
Fact1: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Antigens prompt the body to produce antibodies., Question: Antigens are molecules that prompt the what of antibodies? (A) termination (B) failure (C) humans (D) decrease (E) production (F) anemia (G) rapid expansion (H) kinetic
answer:
E


question:
Fact1: freezing means changing from a liquid into a solid by reducing heat energy, Fact2: When ice freezes, it releases heat energy into the environment., Question: What does ice lose when it is made? (A) water vapor (B) nutrients (C) ocean water (D) Heat energy (E) body water (F) kinetic energy (G) cold energy (H) electric energy
answer:

D