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: Budget flexibility declines drastically so that by 2050, net interest on the debt would absorb roughly half of all federal revenue. Choices:  1. Federal revenue can be increased as per the demand.  2. There are other factors responsible for increasing debts. 3. Federal revenue has been under the threat of increasing debt.

1