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 scale is used for measuring weight, Fact2: All weight is in pounds., Question: what is a scale used for measuring? (A) waves (B) hardness (C) SI units (D) measures (E) intensity (F) fat (G) strength (H) pounds
[EX A]: H

[EX Q]: Fact1: unequal heating of Earth 's surface by the Sun causes global wind patterns, Fact2: Wind belts in the Atlantic Ocean include the trade winds and the prevailing westerlies ., Question: What causes the westerlies? (A) flow of electrons (B) Ocean currents (C) Precipitation (D) to move people (E) Drought (F) scattered light (G) Uneven heating by the sun (H) exposure to cold
[EX A]: G

[EX Q]: Fact1: Most mollusks have shells., Fact2: Cephalopods are a class of marine mollusks., Question: What have shells? (A) keeps the organism warm (B) lima beans (C) whales (D) objects that have mass (E) it needs them (F) most cephalopods (G) barnacles (H) sharks
[EX A]:
F