What is a consequence of following the comparative advantage principle? a. countries only make one kind of good or service. b. wages scale to exactly match the skill of the wage-earners. c. countries become more interdependent on one another for goods and materials. d. goods are traded directly, rather than using monetary trade.

Which of the following statements about nonverbal communication is most accurate? a. the meanings of some gestures can vary among cultures b. the way an e-mail, letter, memo, or report looks can have either a positive or a negative effect on a receiver c. the manner in which we structure and use time can reveal our personalities and attitudes d. all statements are accurate