The Reason Experimenters Randomly Assign Participants to Different Conditions in an Experiment

The reason experimenters randomly assign participants to different conditions in an experiment is to:

A) ensure the sample is as diverse in their characteristics as possible.
B) capitalize on the probability that they will find significant differences between the conditions.
C) be sure the sample is as representative of the population as possible.
D) minimize the effect of confounding due to uncontrolled subject variables.