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: a light bulb converts electrical energy into light energy when it is turned on, Fact2: A photon is a packet of light energy., Question: a bulb converts electrical energy into what type of particle? (A) quarks (B) bosons (C) tiny (D) an object (E) waves (F) electrons (G) photon (H) Vibrates
[EX A]: G

[EX Q]: Fact1: Plants release oxygen during the day but not during the night., Fact2: Plants include blue pine, hemlock, spruce and oak., Question: What releases oxygen during the day but not during the night? (A) elephants (B) dogs (C) hydrocarbons (D) blue pine (E) Conifers (F) vegetation (G) humans (H) Fuel cells
[EX A]:
D