*Question G0B08:
What should be done before climbing a tower that supports electrically powered devices?*  

*Correct Answer is  B: Make sure all circuits that supply power to the tower are locked out and tagged*  

### AI Response: (may contain errors)  

Before climbing a tower that supports electrically powered devices, safety is the top priority. The correct answer is:

**B: Make sure all circuits that supply power to the tower are locked out and tagged.**

### Explanation of the Correct Answer:
- **Lockout/Tagout (LOTO) Procedures**: This is a safety protocol used to ensure that machinery is properly shut off and not able to be started up again prior to the completion of maintenance or servicing work. By locking out and tagging the circuits, you prevent accidental energization, which could lead to serious injury or death.

### Why the Other Choices are Incorrect:
- **A: Notify the electric company that a person will be working on the tower**  
  - While notifying the electric company is a good practice, it does not ensure your immediate safety. The primary action should be to lock out and tag the circuits supplying power to the tower.

- **C: Unground the base of the tower**  
  - This is not a safe practice. Grounding is essential for safety as it helps prevent electrical shock. Ungrounding the tower could create a hazardous situation.

- **D: All these choices are correct**  
  - Since choices A and C are not correct actions to take, this option is also incorrect.

### Summary:
- Always lock out and tag circuits before climbing to ensure safety.
- Notify relevant parties as a precaution, but it is not a substitute for proper safety procedures.
- Maintain grounding to protect against electrical hazards.

By following these safety protocols, you can significantly reduce the risk of accidents while working on or around electrically powered towers.