Definition: 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").
Input: A live copper wire is touched to anther copper wire end to end (A) it doubles in length (B) it melts into a puddle (C) a current can reach further (D) it breaks in half
Output:
C