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.

Statement: Above the first 20 billion pieces, less attractive mail begins to presort and the postal service's costs at the margin undoubtedly begin to increase. Choices: 1. Some of the mail that the postal service deals with is less attractive. 2. The postal service's costs will always decrease. 3. The postal service deals with 30 billions items of mail every year.
2