Corsi et al. (2007) conducted a study of the factors mediating whether injection drug users enter a drug treatment program. In their sample of 491 drug users, 38.1 percent were single; 27.5 percent were married or had a partner; and 34.4 percent were divorced, separated, or widowed. When considering the drug users who actually entered a treatment program, 67 were single; 66 were married or had a partner; and 61 were divorced, widowed, or separated. What kind of chi-square test should Corsi use to analyze the data?
A. goodness-of-fit
B. independence
C. association
D. dissociation