In their study of homeless young adults, Ferguson et al. (2012) recognize the limitation of their study and note that “Because homeless young people are transient and difficult to locate, probability sampling is often not feasible, and purposive sampling . . . is common.” (402) Here the researchers are acknowledging an inability to generalize their findings due to . . .
a. the target population
b. use of a representative sample
c. use of nonprobability sampling
d. the sampling units used
e. census
