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: AC = Average Unit Cost d = Subscript that indicates delivery component of a cost or volume DC = Total Delivery Cost Ev = Long-run variability of non-delivery institutional (fixed) costs. Choices: 1. d stands for delivery component of a cost or volume. 2. There are a few other letters that one must familiarize themselves with. 3. AC stands for alternating current, and DC stands for direct current.

2