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: tidal energy can be used to produce electricity, Fact2: Tidal caves are formed by the energy of the rising and falling tides., Question: what can produce electricity? (A) rivers (B) animal transport (C) tidal caves (D) Nematoda (E) rays or beams (F) animals (G) cactuses (H) photons
Example Output: C

Example Input: Fact1: Annelids are worms such as the familiar earthworm., Fact2: An earthworm has five hearts., Question: One example of an annelid has how many hearts? (A) three (B) Five (C) white (D) warm (E) four (F) strong (G) long (H) small
Example Output: B

Example Input: Fact1: high pressure systems cause clear weather, Fact2: During windy weather, the pollution is dispersed and cleared away., Question: What cause pollution to disperse? (A) low pressure systems (B) fissures of hot, acidic water (C) zero pressure systems (D) fossil fuels (E) harmful substances (F) no pressure systems (G) high pressure systems (H) Greenhouse gases
Example Output:
G