What response indicates that a radio request is fully understood and will be complied with?

• A. Roger that
• B. Confirmed
• C. Wilco
• D. Copy that

Answer: (C)

The phrase "Wilco" is a combination of "will comply," which conveys not only that the radio request has been understood but also that the responder intends to carry out the instruction given. This term is commonly used in aviation and emergency communication to indicate a clear acknowledgment and an assurance of action.

In contrast, phrases like "Roger that" and "Copy that" simply indicate that the message was received and understood, but they do not explicitly confirm commitment to comply with the request. "Confirmed" may imply acknowledgment of the message as well, but it lacks the definitive commitment to act that "Wilco" provides. Thus, "Wilco" stands out as the most appropriate response to indicate full understanding and compliance with a radio request.