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: heating salt water causes the water to evaporate while the salt remains, Fact2: Salt is produced by the evaporation of sea water., Question: how is salt produced? (A) flow of electrons (B) solid, liquid, gas (C) chemical messengers (D) Solutions (E) Physical weathering (F) It gets heated up (G) near the shoreline (H) heating water

Ex Output:
H


Ex Input:
Fact1: planting trees has a positive impact on an ecosystem, Fact2: An ecosystem contains many habitats., Question: doing what with trees has a positive impact on habitats (A) making tables (B) chopping down (C) planting (D) watershed (E) earth (F) bloom time (G) growth (H) timbering

Ex Output:
C


Ex Input:
Fact1: a car engine usually converts gasoline into motion and heat through combustion, Fact2: Oxygen acts as an aid to combustion., Question: What acts as an aid to a car engine converting gasoline into motion and heat? (A) Energy. (B) oxygen (C) nitrogen (D) helium (E) argon (F) energy (G) burning (H) sugar

Ex Output:

B