Why Does Random Assignment Help Control for Confounding Variables

Multiple Choice

Why does random assignment help control for confounding variables?

A) Random assignment ensures that participants in a study are properly motivated to perform the experimental task that will be required of them.
B) Random assignment eliminates individual differences by removing individuals with the same characteristics from the study and only using individuals who have different characteristics.
C) By randomly assigning people to groups, individual differences that may influence the dependent variable are randomly distributed throughout the conditions, rather than being systematically related to the independent variable.
D) By randomly assigning people to groups, all individuals with similar characteristics are grouped together in the same condition.