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, it carries mail that is sealed against inspection and acts as a watchdog over fraudulent use of the mails. Choices: 1. The mail fraud protection methods are costly. 2. It also contains measures to prevent mail fraud. 3. They know it happens but they do not have anything to help against fraudulent use of the mail system. 

1