Conventional radio system

• A. Radios are programmed to operate independently
• B. Radios share a central control by default
• C. Radios are restricted to a single frequency
• D. Radios are controlled by external satellites

Answer: (A)

Conventional radios operate independently; each unit is programmed to a specific frequency or channel and runs without a central controller coordinating all radios. There’s no automatic, built-in coordination across multiple radios in this setup, so operators manage channels and communications manually as needed. This independence is what distinguishes conventional systems from networked or satellite-controlled configurations, which rely on centralized control or external links. So the best description is that radios are programmed to operate independently.