Final answer:
The most suitable approach for writing high-impact business messages is to provide concise and relevant information, employing a clear and precise use of language that makes the intended message more impactful.
Step-by-step explanation:
In the context of writing high-impact business messages, the most appropriate approach is C. Providing concise and relevant information. This is because efficiency and clarity are paramount in business communication. Including irrelevant details or using jargon extensively can confuse the message, thus hindering communication, while using overly complex language to impress may come across as pretentious and impede understanding. Instead, focus on using descriptive diction and employing sensory detail where appropriate to engage the reader while remaining professional. Remember that impact overrules intent, and the way your language is perceived by your reader is more important than what you intended. Therefore, always aim to be clear, concise, and to the point, and use terms that are precise in meaning to enhance the message's impact.