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: matter vibrating can cause sound, Fact2: Thus, sound is a wave in air ., Question: what can matter vibrating cause? (A) Pollution (B) energy (C) Relieve pain (D) kinetic energy (E) wave in air (F) Energy. (G) murmur (H) Greenhouse gases
Example Output: E

Example Input: Fact1: when a body of water receives more water than it can hold , a flood occurs, Fact2: Flood probability is based on past floods., Question: How do we determine the probability of receiving more water than a body can hold? (A) evaporation (B) climate (C) The past (D) watershed (E) Dilution (F) energy usage (G) Temperature (H) salinity
Example Output: C

Example Input: Fact1: Climate is generally described in terms of temperature and moisture., Fact2: Climate change is a global problem., Question: What is changing globally? (A) the number of countries (B) rapid growth (C) how they move (D) temperature and moisture (E) Differences in speed (F) net biomass (G) occurs over a wide range (H) Exposure to oxygen and water
Example Output:
D