Definition: 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: Fact1: gases released during the use of fossil fuels causes global warming, Fact2: Cars and factories burn fossil fuels, releasing nitrogen oxide gases and reactive organic compounds., Question: Driving a car contributes to (A) dark matter (B) Quality of life (C) global warming (D) salty cashews (E) kinetic energy (F) lowered energy cost (G) expansion of the universe (H) survive
Output:
C