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").

Ex Input:
Fact1: All life relies on a relatively narrow range of pH, or acidity., Fact2: All organisms have life cycles., Question: what relies on a relatively narrow range of acidity? (A) organisms (B) carbon (C) animals (D) hydrogen (E) density (F) trees (G) Most plants (H) barnacles

Ex Output:
A


Ex Input:
Fact1: vinegar can cause harm to the eyes, Fact2: Vinegar is dilute acetic acid., Question: What can acetic acid do to the eyes? (A) treat cataracts (B) harm them (C) Relieve pain (D) Dehydration (E) kill them (F) hydrate them (G) protect them (H) cleanse them

Ex Output:
B


Ex Input:
Fact1: Alternation of generations allows for both asexual and sexual reproduction., Fact2: If a single base is altered, a point mutation is generated., Question: a point what allows for both asexual and sexual reproduction? (A) trees (B) graptolites (C) barnacles (D) orchids (E) Summer (F) mutation (G) Most plants (H) pine

Ex Output:

F