Which of These Points Should Psychology Students Keep in Mind

Which of these points should psychology students keep in mind as they examine research results on generational and historical differences in attitudes toward adolescent sexuality?

A) The developmental progression of sexual behaviors has not changed much in the past century.
B) The developmental progression of sexual behaviors has changed dramatically over the past 60 years.
C) Data vary widely depending on which area of the country was surveyed.
D) Data vary widely depending on how questions are phrased.