Which of the following is NOT one of the six C's of communication?

• A. Courtesy
• B. Clarity
• C. Brevity
• D. Coherence

Answer: (C)

The idea behind the six Cs of communication is to identify the key qualities that make messages effective: Courtesy, Clarity, Coherence, Completeness, Correctness, and Conciseness. Each one targets a different aspect—being polite, easy to understand, well organized, full of necessary information, accurate, and brief yet meaningful.

Among the options, Courtesy, Clarity, and Coherence clearly map to those traits. Brevity sits in the same general space as conciseness, but in this framing the six Cs are named with the term Conciseness rather than Brevity. So Brevity isn’t listed as one of the six in this version, which is why it’s the choice that doesn’t fit the named set. The key takeaway is that check the exact terms used in the six Cs in your material, since synonyms like Brevity and Conciseness are often treated as the same idea but may be named differently in different lists.