Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: 'I should think not,' I cut him off. Choices:  1. I let him keep talking. 2. I stopped him from speaking. 3. I cut him off out of frustration.

1