Definition: 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").
Input: Fact1: absorbing sunlight causes objects to heat, Fact2: Collector panels absorb sunlight to heat air., Question: what do collector panels use to heat objects? (A) Solar energy (B) Energy. (C) mechanical (D) energy (E) electricity (F) water (G) ice (H) sunlight
Output:
H