An Archival Study Examining a Woman's Age of First Marriage

An archival study examining a woman's age of first marriage and her probability of divorce would involve what type of procedure?

A) Interviewing women of different ages to find out how they feel about marriage.
B) Gathering divorced women into small groups and asking them about their experiences.
C) Examining day-to-day variations in the happiness ratings that married women provide.
D) Looking at divorce statistics in a given population and comparing age groups of women.