In a Solomon Four-Group Design,if There Is No Effect of the Pretest

Multiple Choice

In a Solomon four-group design,if there is no effect of the pretest,

A) the posttest scores will be different for all the groups.
B) the pretest scores will be different for all the groups.
C) the posttest scores will be the same in both control groups and in both experimental groups.
D) the posttest scores will not be affected by any manipulation.