The largest marital status category of black single parents in 1960 was "married-spouse absent."

You are unable to sleep because your hotel room is right underneath the noisy air conditioning system. We would classify this situation as an

A. external cost. B. internal cost. C. external benefit. D. internal benefit.

If you must make a choice about consuming two apples, three oranges, or one candy bar, the opportunity cost of the candy bar is:

a. two apples. b. three oranges. c. two apples and three oranges. d. two apples or three oranges, whichever you prefer more. e. equal to the difference in the prices of the three options.