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: Flagella help prokaryotes move., Fact2: Flagella and cilia are similar in structure., Question: What helps movement? (A) stamina (B) fur (C) cilia (D) hair (E) kinetic (F) nerves (G) motors (H) elastic

Ex Output:
C


Ex Input:
Fact1: All cells share some of the same structures and basic functions., Fact2: Inside the cell is a structure called the nucleus., Question: All nucleus share the same basic what (A) size (B) rays or beams (C) species (D) Joules (E) location (F) allow growth (G) functions (H) spectrum

Ex Output:
G


Ex Input:
Fact1: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are a sub-category of semiochemicals., Question: Male dogs use_  in urine to mark their territory. (A) ammonia (B) Chemical energy (C) proteins (D) semiochemicals (E) animals (F) heat produced (G) nitric oxide (H) They have thick fur

Ex Output:

D