What Should Be Done If a Mistake Is Discovered After

Multiple Choice

What should be done if a mistake is discovered after the letter has been printed?

A) No correction is necessary,as long as the letter is legible.
B) Carefully correct the error with a black pen and proceed to mail.
C) Apply 'white-out' to the error,and correct with typewriter or black pen.
D) Return to the original document,make the correction,and reprint the letter.