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: 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: Pregnancy is the carrying of one or more offspring from fertilization until birth., Fact2: An elephant pregnancy lasts about 22 months., Question: How long is the time from fertilization until birth for an elephant? (A) minutes (B) fewer (C) winter (D) 22 months (E) eight (F) Ages 0 to 3 (G) 86400 (H) calibrated
[EX A]: D

[EX Q]: Fact1: Cells are programmed to divide only a set number of times., Fact2: Apoptosis is programed cell death., Question: What kicks in after a certain number of divisions? (A) Energy. (B) antibiotics (C) Energy (D) separation (E) nerves (F) apoptosis (G) soccer leagues (H) Plants growth
[EX A]:
F