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: Some pelycosaurs gave rise to a group of animals called therapsids., Fact2: Pelycosaurs are an important lineage preserved in the fossil record., Question: How do we know the lineage of therapsids? (A) Laboratory (B) dinosaurs (C) prokaryotic cells (D) some anthozoans (E) fossil record (F) oral tradition (G) polygenic (H) calibrated
Example Output: E

Example Input: Fact1: All life relies on a relatively narrow range of pH, or acidity., Fact2: Human life is dependent life., Question: what relies on a relatively narrow range of acidity? (A) gravity (B) mammals (C) animals (D) trees (E) humans (F) density (G) volume (H) potatoes
Example Output: E

Example Input: Fact1: a vehicle is used for transportation, Fact2: If in a moving car, pull over and stop as quickly as safety permits, but stay in the vehicle., Question: Moving cars are used for what? (A) their speed (B) transportation (C) feedback mechanisms (D) living in (E) extreme environments (F) arresting (G) safe operation (H) crashing
Example Output:
B