Which of the following words is best associated with external validity? 4

Methamphetamine is _____ and can be _____

a) cheap; safe in small doses. b) highly addictive; fatal. c) a depressant; therapeutic. d) a "smart" drug; useful for taking exams.

Children in which type of families tend to eat fewer fruits and vegetables and have fewer opportunities for physical activity?

A) poor families B) wealthy families C) educated families D) East Coast families