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 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 A]: C

[EX Q]: Fact1: melting means changing from a solid into a liquid by adding heat energy, Fact2: When a substance melts, it changes phase from a solid to a liquid by the application of heat., Question: What can be done to a solid by adding heat energy? (A) massive damage (B) phasing the bubbles (C) It expands (D) cooling the center (E) Evaporation (F) changing the phase (G) removing the air (H) Water expanding
[EX A]: F

[EX Q]: Fact1: chlorophyll is used for absorbing light energy by plants, Fact2: It is essential in the absorption of light energy for photosynthesis., Question: what is chlorophyll essential for? (A) staying warm (B) photosynthesis (C) survival (D) hydrogen and oxygen (E) germinating (F) Most plants (G) plant reproduction (H) plant respiration
[EX A]:
B