In professional letters, indicating a copy to others is done by writing 'cc' followed by the recipient's name.

• A. True
• B. It varies by style
• C. Not sure
• D. False

Answer: (A)

Indicating a copy to others in professional letters is commonly done with a cc line. This line openly shows who will receive a copy of the message, creating a clear paper trail and avoiding surprises about who was informed. The practice harks back to carbon copies, but it remains a standard way to communicate additional recipients in business correspondence. While formatting can vary—different style guides may use "Cc" vs. "cc" or place the line in slightly different spots—the essential idea is the same: name the extra recipients to signal that they are being kept in the loop. So, the statement is correct because it reflects a widely used convention in professional letter writing.