When Studying the Death Rates Patterns of a Population, Why

Multiple Choice

When studying the death rates patterns of a population, why do demographers usually use age specific death rates instead of the crude death rate in their research?

A) Because death rates vary considerably by age
B) Because we cannot accurately measure deaths per year.
C) Because the Center for Disease Control won't release annual death rates in a timely manner.
D) So that we can standardize death rates and exclude deaths related to acts of violence.
E) Because the US became much older between the 1960's and 2016.