What Is the Most Accurate Statement About Sending Goodwill Messages

What is the most accurate statement about sending goodwill messages, including thank-you and sympathy messages?

A) In today's digital age, goodwill messages should no longer be written by hand.
B) Sending an e-mail goodwill message of any kind is acceptable to everyone.
C) Thank-you messages should be sent via e-mail as it is quicker.
D) You should send handwritten sympathy messages using special stationery or cards.