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: Echinoderms lack a centralized nervous system., Fact2: Sand dollars and sea biscuits are also echinoderms., Question: What lacks a centralized nervous system? (A) Damaged hearing (B) Humans (C) Horses (D) Sand dollars (E) insects (F) Chickens (G) Pesticides (H) barnacles

Ex Output:
D


Ex Input:
Fact1: Protozoa can be classified on the basis of how they move., Fact2: Paramecium are protozoa, single celled animals., Question: What can be classified on the basis of how they move? (A) each species (B) aquatic organisms (C) reptiles ancestral to mammals (D) single celled organisms (E) microbes and mussels (F) trailers and boats (G) How fast a vehicle is going (H) melanin content

Ex Output:
D


Ex Input:
Fact1: living things all require energy for survival, Fact2: Carbohydrates, fat and protein provide the energy from food., Question: What can help those with food scarcity survive? (A) food and shelter (B) A Low Carb Diet (C) Pictures of rice (D) Yukon Gold potatoes (E) agriculture (F) Plastic straws (G) animals with backbones (H) hydrate their cells

Ex Output:

D