Enrollment in a particular class for the last four semesters has been 122, 128, 100, and 155 (listed from oldest to most recent). The best forecast of enrollment next semester, based on a three-semester moving average, would be

Top management tends to leave public relations in the hands of the __________ and assumes a relatively passive role, often so they can "get back to business."

A. Expert prescriber C. Communication technician

E-mail messages have not replaced letters because

because A) E-mail tends to be short. B) Letters provide a greater paper trail than e-mail. C) E-mail tends to be casual and conversational. D) All of the above.