Which of these statements regarding the use of e-mail for goodwill messages is most accurate?
A、Because a handwritten note is most impressive, any goodwill message sent by e-mail must always be followed by a more formal handwritten goodwill message.
B、If you frequently communicate via e-mail with the intended receiver and are certain this e-mail will be received, you may send a goodwill message via e-mail.
C、E-mail, personal notes typed on business stationery, and handwritten personal notes are equally appropriate and effective for sending all types of goodwill messages.
D、E-mail can be used for all types of goodwill messages except death condolences, for which a ready-made card is required.