A. enables researchers to see important difference among races. ethnic groups, classes, age groups, and other categories with in the population
B. is the annual number of live births per 1000-woman age 15-44?
C. Is the potential number of children that could be born if every woman of childbearing age bore all the children she possibly could?
D. is the number of live births per 1000 members of a population in a given year