Which of the Following Practices Will NOT Be Considered Unprofessional

Multiple Choice

Which of the following practices will NOT be considered unprofessional when writing a formal e-mail?

A) Using emoticons or smileys to personalize the e-mail message
B) Using all-capital letters or all lowercase letters in the e-mail
C) Ending the e-mail with just the first name rather than a complimentary closing
D) Keeping the subject line of the e-mail empty