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: It is also true that without careful attention to standards, case studies are prone to the kind of overgeneralization that comes from selecting a few instances, assuming without evidence that they are typical or representative of the population and then offering national projections. Choices:  1. Case studies are prone to over-generalization when standards aren't carefully developed ahead of time. 2. Many researchers recommend having a peer double-check the standards before undertaking the case study. 3. Case studies are generalization-proofed.

1