In Addition to Creating Groups of Equal Size,an Advantage of Block

Multiple Choice

In addition to creating groups of equal size,an advantage of block randomization is that it

A) decreases the number of participants needed in each condition.
B) averages the effect of the dependent variable across the conditions of the experiment.
C) holds constant the time in which an experiment is run.
D) balances potential confoundings that occur during the time in which an experiment is run.