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: 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
Example Output: C

Example Input: Fact1: global warming is when worldwide temperature increases, Fact2: Global warming is caused by carbon dioxide trapped in the atmosphere., Question: What does carbon dioxide cause? (A) skateboards (B) Greenhouse gases (C) Worldwide temperature increase (D) major threat to health (E) direct damage to the lungs (F) running (G) a lot of human deaths (H) Temperature decrease
Example Output: C

Example Input: Fact1: temperature changing can cause phase changes, Fact2: Phase changing is important for transferring energy in the atmosphere., Question: what changing can cause transferring energy in the atmosphere (A) deforestation (B) bearing (C) temperature (D) global warming (E) days (F) direction (G) heating liquids (H) The atmosphere
Example Output:
C