To Lessen the Potential Detrimental Impact of Social Programs, Researchers

To lessen the potential detrimental impact of social programs, researchers should do all of the following, except:

A) Vary treatments among settings rather than among individuals within a setting
B) Use the minimum sample size required to adequately test the results
C) Minimize the number in the untreated control group
D) Test just parts of new programs, rather than the entire program
E) Compare the presence and absence of treatments, rather than those that vary in intensity