*Question T2C04:
What is RACES?*  

*Correct Answer is  D: An FCC part 97 amateur radio service for civil defense communications during national emergencies*  

### AI Response: (may contain errors)  

RACES stands for Radio Amateur Civil Emergency Service. It is an FCC Part 97 service that allows amateur radio operators to provide emergency communications during national emergencies. 

### Explanation of the Correct Answer:
- **Correct Answer (D)**: RACES is specifically defined under FCC regulations (Part 97) as a service that supports civil defense communications. It is organized to provide emergency communication support when traditional communication systems fail, particularly during disasters or national emergencies.

### Explanation of Incorrect Answers:
- **A**: This choice suggests that RACES combines amateur radio and citizens band (CB) operators. While RACES does involve amateur radio operators, it does not include CB operators or their frequencies. RACES is strictly an amateur radio service.
  
- **B**: This option describes an "international radio experimentation society," which does not accurately represent RACES. RACES is focused on emergency communications rather than experimentation or international collaboration.
  
- **C**: This choice refers to a "radio contest held in a short period," commonly known as a "sprint." While contests are a part of amateur radio, they are unrelated to the emergency services provided by RACES.

### Summary:
- RACES is a structured service under FCC regulations for emergency communications.
- It does not involve CB operators, experimentation, or contests.

Understanding RACES is crucial for amateur radio operators, especially those interested in emergency preparedness and public service.