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 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: Flowing water can slowly dissolve carbon in sedimentary rock., Fact2: Rivers and streams are bodies of fresh, flowing water., Question: What can slowly dissolve carbon in sedimentary rock? (A) hydrocarbons (B) acetic acid (C) precipitation (D) evaporation (E) rivers and streams (F) puddles (G) ponds (H) nitrogen

Ex Output:
E

Ex Input:
Fact1: bacteria in soil convert atmospheric nitrogen into a form usable by plants, Fact2: Plants have to have nitrogen to grow., Question: What do plants need to grow? (A) energy (B) sunlight (C) nutrients (D) bacteria (E) lifting (F) Energy. (G) muscle (H) darkness

Ex Output:
D