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: We first present our model for total costs and unit costs. Choices:  1. The first model took the longest time to present. 2. The model for total costs and unit costs was presented at the very end. 3. The model for total costs and unit costs is presented first.

2