Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Input: Statement: Liberal social scientists latched onto Elkins' theory as a rationale for creating policies to tear down the barriers that were impeding black advancement in the 1960s. Choices: 1. Some blame federal law on for impeding black advancement. 2. Elinks' theory was not used as rationale for creating policies. 3. Black advancement was being impeded during the 1960s.

1