What is demography? ​

the study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.

Explanation:

Demography is the statistical study of human populations. Demographers use census data, surveys, and statistical models to analyze the size, movement, and structure of populations.

answer(c); cultural values may have affected jack's grandmother's and aunt's belief about extended family;