Which of the following activities is prohibited for amateur radio operators?

• A. Experimental and research-driven communication
• B. Providing emergency communications during disasters
• C. Engaging in commercial activities
• D. Operating during licensed contests

Answer: (C)

Amateur radio operators are primarily allocated their frequency bands for personal use, research, experimentation, and emergency communications. These privileges come with the responsibility to not use the amateur radio spectrum for business or commercial purposes. Engaging in commercial activities is prohibited because the amateur radio service is intended to be a non-profit endeavor that fosters personal enjoyment and technical proficiency among operators.

Amateur operators can engage in experimental and research-driven communication (which promotes innovation and learning), provide emergency communications during disasters (which is crucial for public safety), and participate in licensed contests (which are organized events recognized within the amateur radio community). However, any exchange or promotion of financial gain or commercial services would violate the fundamental principles of amateur radio as established by the FCC regulations.