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: Nearly three months ago, when the administration at the National Autonomous University of Mexico proposed a raise in student tuition from 2 cents to about $150 a year, students closed down the classes with a strike, affecting 267,000 students and 30,000 professors. Choices: 1. When a raise in tuition was proposed from 2 cents to about $150 a year, students went on strike. 2. When a raise in tuition was proposed from 2 cents to about $150 a year, students agreed with the proposition.  3. When a raise in tuition was proposed from 2 cents to about $150 a year, students went on strike due to the unfairness of the proposition. 

3