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: Installation of the control device hookup on a sequential basis usually involves an overlap of compliance testing of FGD system on one unit with hookup of an FGD system with the next unit. Choices:  1. One unit can be hooked up while the previous hookup is being tested for compliance. 2. Total hookup time is lessened by doing hookups sequentially. 3. Hookup cannot proceed from one unit to the next until the first unit is completely hooked up and tested for compliance.

3