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: As explained in the regulatory impact analysis for the Heavy-Duty Engine/Diesel Fuel rule. Choices:  1. That is explained in the impact analysis. 2. That is explained in the impact analysis on page 538. 3. That is never explained, despite the impact analysis being published.

3