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 glacier causes mechanical weathering, Fact2: Largest of the glacier-formed lakes is Karakul., Question: What can be formed by mechanical weathering? (A) NaCl (B) white (C) rock (D) tube (E) soils (F) Roads (G) Lakes (H) sand
[EX A]: G

[EX Q]: Fact1: a light bulb is used for seeing in the dark, Fact2: Light is emitted by a light bulb., Question: What is required for seeing? (A) dark (B) sun (C) light (D) wind (E) retina (F) eyes (G) photons (H) copper
[EX A]: C

[EX Q]: Fact1: Earth 's tilt on its rotating axis causes seasons to change, Fact2: Autumn brings the changing of the seasons., Question: Earth's tilt on its rotating axis causes what? (A) rainfall (B) wind (C) rest (D) spring (E) autumn (F) pollution (G) taxes (H) death
[EX A]:
E