Program Evaluation Research Differs from Strictly Experimental Research in Which

Program evaluation research differs from strictly experimental research in which of the following ways? (circle all that apply)

A) program evaluators are exclusively involved in planning and implementing the intervention or treatment program
B) program evaluation is unique in that it almost always utilizes quasi-experimental designs
C) evaluation research has an explicitly political character
D) program evaluation research will often build some flexibility into the research design, so that program stakeholders can potentially make adjustments and improvements to the treatment or intervention as new information becomes available