A group of students run a simulation of resource consumption in which cereal is used to model a resource. The students use tweezers to pick up pieces of cereal one at a time and place them in a cup. The group runs the simulation two times, keeping all factors the same except the number of students allowed to collect the cereal at the same time. What variable are the students most likely testing?

A. Conservation method
B. Use of technology
C. Evenness of distribution
D. Population size