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: having food has a positive impact on an organism 's health, Fact2: Birds and animals eat such food ., Question: What generally has a positive impact on an organism's health? (A) stay warm (B) sex with multiple partners (C) smoking (D) exercise (E) nutrients (F) eating (G) Cooking (H) fasting
[EX A]: F

[EX Q]: Fact1: nuclear reactions in stars causes stars to produce light, Fact2: And, of course, the Sun is a star., Question: What in the sun causes the sun to produce light? (A) energy of moving objects (B) hydrogen and oxygen (C) heat energy (D) water (E) solar rays (F) rotation (G) nuclear reactions (H) kinetic energy
[EX A]: G

[EX Q]: Fact1: Female gametophytes produce eggs inside the ovaries of flowers., Fact2: Flower buds appear in the growing tip of the plant., Question: Where do female gametophytes produce eggs? (A) peachleaf willow (B) The bottom of plants (C) Earth orbiting the Sun (D) The middle of plants (E) the environment (F) underground (G) The tips of plants (H) plant reproduction
[EX A]:
G