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: Plants live just about everywhere on Earth., Fact2: Epiphytes are plants that live on other plants., Question: Where do epiphytes live? (A) swamp vegetation (B) mountains (C) vegetation (D) the environment (E) peachleaf willow (F) ice (G) rocks (H) everywhere on earth

Ex Output:
H

Ex Input:
Fact1: Roots have primary and secondary meristems for growth in length and width., Fact2: Size is measured by width and length., Question: growth in what is caused by primary and secondary meristems in roots? (A) H 2 O (B) bamboo (C) population (D) offspring (E) bushes (F) bulbs (G) clouds (H) size

Ex Output:
H