The correct answer is C: Look for and stay clear of any overhead electrical wires. An important safety precaution when putting up an antenna tower is to look for and stay clear of any overhead electrical wires. Contact with power lines can cause electrocution, serious injury, or death. Towers and antennas must be positioned so that if they fall, they cannot contact power lines. For amateur radio operators, this is the most critical safety consideration when installing towers. Understanding this helps prevent fatal accidents.