Margo spends $30,000 on one year's college tuition. The opportunity cost of spending one year in college for Margo is: whatever she would have purchased with the $30,000 plus whatever she would have earned had she not been in college. whatever she would have earned had she not been in college. whatever she would have purchased with the $30,000 instead. $30,000.

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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