In terms of the salutation, which of the following statements is CORRECT?
A.
The salutation is the complimentary close with which every letter ends.
B.
In all English-speaking countries, if you don't know the name of the recepient, you can address them as Dear Sir or Gentlemen.
C.
If the receiver is known to the writer personally, a less formal and warmer greeting is used, such as "Dear Mr.White" or "Dear Ms. Bontous".
D.
Salutation can only be followed by a comma.