Name two common visual signaling devices and their use.

• A. Morse code lamps for nighttime signaling and semaphore flags for daylight signaling.
• B. Megaphones for daylight signaling and radio beacons for nighttime signaling.
• C. Signal flags for daylight signaling and Aldis lamps for nighttime visual signaling.
• D. Lanterns for daytime signaling and bells for nighttime signaling.

Answer: (C)