Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine which sentence can be inferred from the statement. Incorrect choices change the meaning in important ways or have details that are not mentioned in the statement. Indicate your answer as 1,2, or 3 corresponding to the choice number of the selected sentence.
Input: Statement: Prior to reaching production for its Signature 600 engine, Cummins used many prototypes to complete hundreds of thousands of test hours, accumulating millions of test miles. Choices:  1. Cummins didn't use any prototypes prior to the production stage of the Signature 600 engine. 2. There were hundreds of thousands of test hours used before production for the Signature 600 engine was completed. 3. Cummins was concerned that flaws in the previous design were going to carry over.

2