Which Best Describes a Two-Group Pretest-Posttest Design

Which best describes a two-group pretest-posttest design?

A) Participants are assigned to either a treatment group or a no-treatment control group, with measures being taken for both groups after the intervention is administered to determine if they differ on the desired outcome.
B) Participants are assigned to a treatment group, with measures being taken for the group before and after the intervention is administered to determine if they differ on the desired outcome.
C) Participants are assigned to a treatment group, with measures being taken after the intervention is administered to determine if there is an effect on the desired outcome.
D) Participants are assigned to either a treatment group or a no-treatment control group, with measures being taken for both groups before and after the intervention is administered to determine if they differ on the desired outcome.