A Human Services Program Director Would Do an Impact Program

A human services program director would do an impact program evaluation when there is a need to do all EXCEPT which of the following:

A) compare two groups to determine if there is a difference between the level at which program clients show improvement.
B) if there can be only one point of evaluation.
C) to determine that the improvement is due to the program and not some external feature.
D) what happens to clients who participate in the program versus those who do not.