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: a compass is used to navigate oceans, Fact2: And to the east is the Atlantic Ocean., Question: what is a compass used to navigate? (A) density (B) lamphreys (C) marine (D) outer space (E) their speed (F) Antarctica (G) non-magnetic planets (H) the Atlantic

Ex Output:
H


Ex Input:
Fact1: Female monotremes lack a uterus and vagina., Fact2: Monotremes are mammals that lay eggs., Question: What do some female mammals lack? (A) epidermal (B) vision (C) uterus (D) alleles (E) fur (F) a cuticle (G) eardrum (H) alveoli

Ex Output:
C


Ex Input:
Fact1: Secondary meristem is located within and around the vascular tissues., Fact2: Plant tissues are produced from meristems., Question: What has vascular tissue? (A) rocks (B) the Sun (C) trees (D) plants (E) grass (F) Conifers (G) all plankton (H) Oak

Ex Output:

D