A child says "cookie," meaning "I want a cookie." The word "cookie" is an example of a/an

If you poll young people in the United States today, what comment are you MOST apt to hear?

a) "I plan to cohabit, but only to decide if I want to marry this person." b) "I don't plan to get married, because it's just a piece of paper and I'll do perfectly fine if I just live with my love." c) " I want to make sure that I know who I am and be economically secure before I get married." d) "I expect to get married and divorced at least once."

A researcher who flips a coin to determine in which treatment group participants will be assigned is using

A) a confounding variable. B) matching. C) a natural, or quasi-, experiment. D) random assignment.