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 Q]: Fact1: a plant requires photosynthesis to grow, Fact2: Legumes are typical of that type of plant., Question: what requires photosynthesis to grow? (A) Roundworms (B) clouds (C) Conifers (D) Echinoids (E) humans (F) h2o (G) legumes (H) sugar
[EX A]: G

[EX Q]: Fact1: energy is used for heating a building by a heating system, Fact2: Faculty offices are also in the building., Question: What contains energy to raise the temperture of an office? (A) chemical messengers (B) peachleaf willow (C) deoxyribonucleic acid (D) cooling system (E) swimming pool (F) heating system (G) gym (H) organic molecules
[EX A]: F

[EX Q]: Fact1: lakes are formed by precipitation and runoff, Fact2: Snowmelt runoff is a significant source of annual runoff., Question: Snowmelt can help form what? (A) calories (B) lakes (C) rivers (D) sunlight (E) streams (F) moonlight (G) soils (H) erosion
[EX A]:
B