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: The latter factor exists because postal systems need to be designed to handle a wide range of mailpieces, generated by a wide range of mailers. Choices: 1. Postal systems only need to handle one kind of mailpiece. 2. Some of the mailers using the postal system do not know what they're doing. 3. A wide range of mailers are likely to use the postal system.

2