*Question T0B02:
What is required when climbing an antenna tower?*  

*Correct Answer is  D: All these choices are correct*  

### AI Response: (may contain errors)  

When climbing an antenna tower, safety is the top priority. The correct answer is:

**D: All these choices are correct.**

### Explanation of the Correct Answer:
1. **Sufficient Training**: 
   - Climbing an antenna tower can be dangerous. Proper training ensures that climbers understand safety protocols, equipment use, and emergency procedures.
  
2. **Appropriate Tie-Off**: 
   - Using a tie-off system prevents falls. Climbers should always be secured to the tower with a safety line to minimize the risk of injury.

3. **Approved Climbing Harness**: 
   - An approved climbing harness is essential for safety. It distributes weight evenly and provides secure attachment points for safety lines.

### Why Other Choices Are Incorrect:
- Since all the choices (A, B, and C) are essential components of safe tower climbing, none of them can be considered incorrect. Each choice contributes to a comprehensive safety strategy.

### Useful Safety Guidelines:
- Always inspect your climbing gear before use.
- Use a buddy system when climbing to ensure assistance is available in case of an emergency.
- Familiarize yourself with the specific tower and its environment before climbing.

By adhering to these safety practices, climbers can significantly reduce the risks associated with tower climbing.