Which Statement About the Lifespan Is MOST True

Multiple Choice

Which statement about the lifespan is MOST true?

A) Most people's lives are the same,no matter where in the world they live.
B) Throughout history,people's day-to-day lives have not changed much no matter where in the world they live.
C) Most ideas about proper human behavior are universal.
D) The human lifespan varies dramatically depending on cohort,socioeconomic status,cultural background,and gender.