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: Flash evaporators are used to make fresh water from salt water., Question: Doing what to salt water causes the water to become fresh water? (A) watershred (B) freezing (C) Regrows it (D) migrate (E) pouring (F) heating (G) cooling (H) erosion

Ex Output:
F


Ex Input:
Fact1: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What is formed by rivers? (A) fish (B) soil (C) rain (D) bamboo (E) spring (F) clouds (G) kayaks (H) NaCl

Ex Output:
B


Ex Input:
Fact1: Sponges are a source of food for many species of fish., Fact2: Sponges live on the bottom of oceans, rivers, and streams., Question: where do many species of fish find food? (A) salt and water. (B) on land (C) important habitats (D) bottom of oceans (E) clouds (F) search (G) the body's largest organ (H) body water

Ex Output:

D