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").

Input: Consider Input: Fact1: Air pollution harms the respiratory and circulatory systems., Fact2: Cars are a significant source of air pollution., Question: What harms the respiratory and circulatory systems? (A) oil (B) rain (C) sulfur (D) cars (E) tires (F) coal (G) tar (H) bicycles

Output: D

Input: Consider Input: Fact1: conserving water can be used for survival in a dry environment, Fact2: We learned about desert plants and how they adapt themselves to the hot dry desert environment so they can survive., Question: Plants can conserve water in order to survive where? (A) our planet (B) in a vacuum (C) in the desert (D) Earth's atmosphere (E) In the winter (F) in a laboratory (G) on the moon (H) forest is destroyed

Output: C

Input: Consider Input: Fact1: Flowers produce spores that develop into gametophytes., Fact2: Tulips are heavy flowers., Question: What produces spores that develop into gametophytes? (A) plants (B) ice (C) tulips (D) bushes (E) orchids (F) sunlight (G) glaciers (H) cacti
Output: C