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: It did not demonstrate design stability until about 3 years after it held its critical design review. Choices:  1. The design review was held after a year. 2. It demonstrated design stability about 3 years after. 3. The design stability was in doubt during the 3 years.

1