An Experiment Has Two Experimental Groups and Two Control Groups;

An experiment has two experimental groups and two control groups; a treatment or stimulus that is applied only to the experimental groups; protests that measure the dependent variable prior to the treatment for one of the experimental groups and one of the control groups; and post-tests that measure the dependent variable after exposure to the treatment for all groups. What type of experimental design is being used?

A) A one group no pre-test experimental design model.
B) A Solomon four group experimental design model.
C) A two group no pre-test experimental design model.
D) A two group pre-test/post-test experimental design model.

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