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: In the desert it was harder to find a (A) stream (B) cactus (C) dry bed (D) canyon
Example Output: A

Example Input: An example of a house hold item that could be an insulator could be (A) Diamonds (B) Silver (C) Gold (D) Tupperware
Example Output: D

Example Input: What can you point to as an example of water vapor? (A) a mountain that looks like a bear (B) the smoke coming from a distant fire (C) a group of birds that looks like a wine glass (D) a white puff in the sky that is shaped like a bird
Example Output:
D