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: Consider Input: Fact1: Ancestors of hagfish are thought to have been the earliest vertebrates., Fact2: Property of ancestors and forefathers can only be legally inherited by sons., Question: Forefathers of what kind of fish are thought to be the earliest vertebrates? (A) hagfish (B) Pelycosaur (C) fish (D) angiosperm (E) adult (F) Therapsids (G) marine (H) aquatic

Output: A

Input: Consider Input: Fact1: Hormones control many cell activities, so they are very important for homeostasis., Fact2: Hormones travel in the bloodstream to cells that are called target cells a., Question: what allows molecules to travel to control many cell activities (A) skin (B) heat energy (C) animal transport (D) bloodstream (E) Chemical energy (F) nasal passage (G) movement (H) fat tissue

Output: D

Input: Consider Input: Fact1: living things all require energy for survival, Fact2: All foods provide energy., Question: What do living things require for survival? (A) faith (B) love (C) bamboo (D) food (E) heat (F) oxygen (G) warmth (H) friendship
Output: D