A college student who does laundry infrequently wants to determine the effect of bluing on what should be white clothes. Select the sample most representative of the population.

A. Reports of two friends, one of whom was given bluing

B. The reports of an internet chatroom on laundry techniques

C. Two loads of personal wash, one with, one without bluing

D.

Two loads of wash, one personal, one of a friend, the bluing assigned by a coin flip