In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Example Input: Using mirrors to focus collected light from heavenly bodies allows (A) detailed observation (B) foregone conclusions (C) radiation experiments (D) celestial music
Example Output: A

Example Input: Where might you find the substance used to make the shiny metallic foil paper used in cooking? (A) Clouds (B) Rocks (C) Wood (D) Leaves
Example Output: B

Example Input: If the stars in the sky above your home vary from month to month, (A) that is a new phenomenon (B) that is expected due to the axis (C) that is very scary (D) that is rare and unusual
Example Output:
B