Which of These Research Scenarios Would Be Appropriate for Using

Multiple Choice

Which of these research scenarios would be appropriate for using a nonprobability sample?

A) to determine whether Canadian prisoners are less healthy than the rest of the population
B) to explore whether research subjects understood the wording for a newly developed survey question before it was included on a nationwide survey
C) to compare the prevalence of asthma in Canada with the prevalence in India
D) There is never an appropriate situation for using nonprobability samples.