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: Ancient glaciers eroded many of the valleys, creating space for the lakes as they melted at the end of the last Ice Age, approximately 8,000 b.c. Choices: 1. The valleys were created by the last ice age. 2. The floodwaters from the last ice age destroyed the area. 3. The last ice age ended approximately 10,000 years ago.

1