Which magazine made photographer Annie Leibovitz famous?

A script that has absolutely no video in it is called

a) A VO or voice over b) a reader c) a minus VO d) it can be called any of the above

Choose the research term that describes "participants drop out of study that occurs over a long-time period."

A. Internal validity B. External validity C. Ecological validity D. Morality or attrition E. Maturation