What Is the Difference Between a Within-Participants Design and a Between-Participants

Multiple Choice

What is the difference between a within-participants design and a between-participants design?

A) the former exposes the participants to more than one level of the independent variable
B) the former involves all participants experiencing all levels of the independent variable
C) the latter exposes all participants to all levels of the independent variable
D) the latter involves research participants testing each other, rather than the experimenter testing them