The Pretest/posttest Design Using Only the Program's Clients Can Help

Multiple Choice

The pretest/posttest design using only the program's clients can help introduce the staff to the merits of program evaluation because

A) this is a very sophisticated research design.
B) the threats to internal validity are all controlled except for instrumentation and the interaction of selection by maturation.
C) a plan to compare the program group with people in other programs might be rejected because the staff feels too threatened.
D) it is easier to take the needs of all stakeholders into account using this design.