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: In addition, in U.S. rural areas carriers serve principal roads only and residents who do not live on the carrier's line of travel must place their mailboxes on that road. Choices: 1. This is so the carriers don't have to go explore the backwoods. 2. Mailboxes in rural areas must be placed on the roads that the carriers line  travels. 3. The rural area carriers will go wherever they are needed.

1