Which response would indicate a need to clarify a previous message?

The response of "Repeat" indicates a need to clarify a previous message because it specifically requests the original information to be stated again. When someone asks for a repetition, it usually suggests that they did not fully understand the initial message or encountered some form of confusion. This is a proactive communication strategy to ensure accuracy and clarity, which is crucial in situations where information is critical, such as in law enforcement or emergency responses.

Acknowledgements like "OK" indicate receipt of information but do not inherently suggest any misunderstanding. "Out of Service" generally refers to the status of a unit or individual, while "Receiving Poorly" suggests an issue with the transmission of the message rather than a lack of understanding of its content. Thus, "Repeat" is the most direct call for clarification.