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: coal is used for generating heat by burning, Fact2: Coal and lignite are the lithified remains of plants., Question: What are the lithified remains of plants used for? (A) heat production (B) generating heat by burning (C) harvesting crops (D) damming rivers (E) food and shelter (F) heat is produced (G) A transportation fuel (H) planting seeds
Example Output: B

Example Input: Fact1: a pesticide is used for protecting plants by killing insects, Fact2: Pesticides also kill beneficial insects that pollinate flowers and prey upon harmful insects., Question: What is used for protecting plants while killing beneficial pollinators? (A) watering cans (B) dangerous (C) toxins (D) pesticide (E) irrigation (F) exoskeleton (G) steroids (H) plant food
Example Output: D

Example Input: Fact1: Echinoderms have a unique water vascular system with tube feet., Fact2: Starfish and sea urchins are also echinoderms., Question: what have a unique water vascular system with tube feet? (A) h2o (B) insects (C) sea urchins (D) bushes (E) Most plants (F) Conifers (G) orchids (H) humans
Example Output:
C