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 variable cost of delivery depends on volume delivered, thus the comparison of variable costs between France and the U.S. is straightforward. Choices: 1. The variable cost of delivery depends on how many letters there are. 2. The variable cost of delivery depends on how many residents there are. 3. The variable cost of delivery depends on how many letters there are on a flight.

3