Secretary A will use "Sincerely" as the complimentary closing of a letter to a colleague. Secretary B will use "Cordially" as the complimentary closing of a letter to a friend. Which secretary is using the correct closing?

A. Neither secretary
B. Both secretaries
C. Only secretary A
D. Only secretary B

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To determine which secretary is using the correct closing, we need to understand the appropriate usage of complementary closings in letters.

A complimentary closing is a polite ending to a letter, typically placed right before the signature. It serves to convey the writer's sentiment and can vary depending on the relationship between the sender and the recipient.

In this case, Secretary A is using "Sincerely" as the complimentary closing, while Secretary B is using "Cordially." To identify which closing is correct, we need to consider the nature of the letters and who they are addressed to.

"Sincerely" is a commonly used closing that is best suited for formal or professional correspondence, such as business letters. It indicates a level of formality and suggests that the writer is sincere and trustworthy.

"Cordially," on the other hand, is a closing that implies warmth and friendliness. It is often used in informal or personal letters, such as those written to friends or acquaintances.

Based on the information provided, Secretary A is writing to a colleague, suggesting a professional or formal context. Therefore, using "Sincerely" as the complimentary closing is appropriate.

Secretary B, however, is writing to a friend. In this case, using "Cordially" as the closing is appropriate for an informal and friendly letter.

Therefore, the correct answer is:

C. Only Secretary A is using the correct closing.