Which research design would allow a researcher to determine whether the study's finding about heterosexual marriage and alcohol consumption also holds for same-sex marriage?
A. Ask a random sample of respondents whether individuals in same-sex marriages consume alcohol in different patterns than married heterosexuals.
B. Conduct a study of gender role attitudes that consists of respondents currently living with a partner, including those in same-sex marriages.
C. Survey alcohol consumption patterns of a random sample of American adults across demographic characteristics, including sexual orientation.
D.Compare rates of alcohol consumption among a random sample of single, homosexual respondents and those married to a same-sex partner.
