Sophie, a Manager, Sends an E-Mail Warning Jack, an Employee

Sophie, a manager, sends an e-mail warning Jack, an employee, of disciplinary action to be taken if he persists in taking long coffee breaks and spending too much time on personal phone calls. However, Jack did not attach too much importance to the e-mail. He felt it was akin to a passing reminder. Which of the following is a reason why Sophie should have spoken to Jack directly and avoided the use of e-mail?

A) Electronic media leaves a permanent record of communication for later reference.
B) Electronic media encourages more people to participate and share their ideas with.
C) Electronic media prevents interpretation of subtle nonverbal cues conveyed by the sender.
D) Electronic media reduces time and expenses related to traveling, photocopying, and mailing.
E) Electronic media enables routine messages to be sent with speed and efficiency.