Answer:
C. race-specific prevalence
Step-by-step explanation:
- Incidence rate refers to the rate of new cases of hypertension.
- Prevalence refers to the total number of cases of hypertension at the point of time the survey happened.
- Because what's wanted is to compare the frequency of hypertension in two groups of adult males 30-39 years of age:
- Prevalence is the right measure to use, because the total number of cases is what's wanted, not only the new cases.
- Race-specific prevalence has to be used instead of overall prevalence, because the two groups being compared are defined by race.