A Researcher Operationalizes the Variable "Marital Status" as Whether a Client

A researcher operationalizes the variable "marital status" as whether a client reports that he or she is married or single. He hopes to study the relationship between gender and marital status among clients in a correctional facility. What options for the selection of a test of statistical inference are available?

A) Only a parametric test can be used.
B) Only a non-parametric test can be used.
C) Either parametric or non-parametric tests can be used if the research sample is a random one.
D) Parametric tests can be used, but only if the size of the research sample is large.