The "hand purse" gesture means "good" or "slow down" in some cultures. In American culture, it doesn't have a clear meaning; therefore, it is a(n)

In the past 40 years, the proportion of students who have completed high school has:

A) halved. B) doubled. C) tripled. D) quadrupled.

What is the most important element when generating possible solutions to a problem?

a. ?convergent thinking b. ?single-mindedness c. ?time d. ?narrowing down the choices to the correct one