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: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Rivers provide a water supply., Question: What is formed by deposition of sediment at the mouth of a water supply fanning out? (A) a hurricane (B) soils (C) a delta (D) an ocean (E) soft soil (F) an island (G) detritus (H) spring

Ex Output:
C

Ex Input:
Fact1: a light bulb converts electrical energy into light energy when it is turned on, Fact2: Light bulbs are rated in Watts., Question: How is converted energy into light energy rated? (A) energy (B) unique (C) heat (D) good (E) watts (F) parsec (G) kilojoule (H) kinetic energy

Ex Output:
E

Ex Input:
Fact1: Earth 's magnetic patterns are used for finding locations by animals that migrate, Fact2: Boreal and temperate species have generally survived by migrating., Question: How do boreal species ensure their survival? (A) Staying put (B) population movement (C) Leaving children behind (D) Earth's magnetic field (E) Going to work (F) food and shelter (G) genetic diversity (H) looseness of dirt or compost

Ex Output:
D