Life span developmental studies are based on the idea that:

A. development occurs early in life, but not in late adulthood.

B. there is almost no continuity over the lifespan, so an individual's history has little effect on development.

C. sociohistorical events affect development, but not enough to make any real difference.

D. every part of the lifespan is influenced by earlier events, and will in turn affect later events

My choice is D. Is it right?

Right!

Yes, your choice of D is correct. Life span developmental studies are based on the idea that every part of the lifespan is influenced by earlier events and experiences, and in turn, these earlier events and experiences will impact later events and development. This perspective recognizes that development is an ongoing process that occurs throughout the entire lifespan, and that earlier experiences and factors can have long-lasting effects on an individual's development and well-being. It emphasizes the interconnectedness and continuity of development across the lifespan.