The 7 C's of communication are:
1. Completeness - ensuring the message contains all relevant information for the intended reaction or response.
2. Conciseness - composing the message briefly while including all key points.
3. Consideration - keeping the audience in mind when composing the message and focusing on their benefits or interests.
4. Concreteness - making statements specific rather than general to avoid misunderstanding.
5. Clarity - composing the message so the receiver understands it clearly.
6. Courtesy - using respectful words appropriate for the audience.
7. Correctness - carefully attending to grammar, mechanics, accuracy and appropriate language level.