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: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Rivers provide a water supply., Question: What is formed by deposition of sediment at the mouth of a water supply fanning out? (A) a hurricane (B) soils (C) a delta (D) an ocean (E) soft soil (F) an island (G) detritus (H) spring
C

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: Some viruses live in a dormant state inside the body., Fact2: Although the herpes virus never leaves the body, it can lay dormant for long periods of time., Question: How does herpes stay in a person? (A) It reproduces quickly (B) hospitalization (C) decreases (D) It dies and never comes out (E) It stays active (F) It remains dormant (G) They may not survive. (H) It helps them survive

F