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").

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
A

Fact1: wiring requires an electrical conductor, Fact2: Wires connected to a source of electricity., Question: An electrical conductor is required for the operation of: (A) water current (B) electricity (C) satellites (D) energy (E) to move people (F) gas lamps (G) trains (H) lightning
B

Fact1: a wildfire changes an ecosystem drastically, Fact2: An ecosystem is like a neighborhood in nature., Question: What does a wildfire change drastically? (A) rapid changes occur (B) unicellular organisms (C) Fire (D) Rocks (E) A neighborhood in nature. (F) occurs over a wide range (G) Change (H) single cell microorganisms
E