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: a plant requires sunlight for photosynthesis, Fact2: Photosynthesis is the process of making food., Question: What do plants require to make food? (A) nutrients (B) sunlight (C) photons (D) Energy. (E) Light (F) Proteins (G) power (H) heat energy
[EX A]: B

[EX Q]: Fact1: an egg requires warmth to survive, Fact2: First the frog lays the eggs, then the warmth from the sun makes the eggs hatch into baby tadpoles., Question: what keeps eggs warm? (A) ice (B) hair (C) wool (D) bears (E) fur (F) sun (G) moss (H) sand
[EX A]: F

[EX Q]: Fact1: Mating is generally preceded by courtship., Fact2: Courtship patterns vary with species., Question: what patterns vary with species? (A) h2o (B) mating (C) insects (D) humans (E) the sun (F) Decibels (G) complex (H) colors
[EX A]:
B