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").

Example Input: Fact1: Insulin helps cells take up glucose from the blood., Fact2: Insulin made by a person's own pancreas is endogenous insulin., Question: what type of compounds produced by a person's pancreas help cells take up compounds (A) Energy (B) natural (C) mineral (D) endogenous (E) Break down food (F) it needs them (G) sweat glands (H) Energy.
Example Output: D

Example Input: Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Pysical weathering is the mechanical breakdown of rocks., Question: What is when rocks are broken down? (A) roof weathering (B) Plant growth is reduced (C) brick weathering (D) Physical weathering (E) remains of prehistoric life (F) at or near the margins (G) home weathering (H) major threat to health
Example Output: D

Example Input: Fact1: Pollen consists of tiny grains that are the male gametes of plants., Fact2: Flowers are the sex organs of certain plants and hold the male and female gamete producing systems., Question: pollen consists of tiny grains that are held within what (A) bees (B) fruits (C) vegetation (D) flowers (E) lmestone (F) an object (G) loose dirt (H) leaves
Example Output:
D