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: the color of leaves on deciduous trees usually changes in the autumn season, Fact2: Autumn is a season of transistion as the warm summer days fade giving way to cooler weather., Question: During what time frame do deciduous trees' leaves change color? (A) summer end (B) dry and hot (C) summer start (D) barrel-shaped (E) dry conditions (F) winter (G) after winter (H) climate
Output:
A