The correct answer is: A. Surge suppressor.
A surge suppressor is a device that is designed to protect electrical equipment from power surges. It does this by diverting the surge to a ground wire. Surge suppressors are available in a variety of sizes and types, and they can be used to protect individual appliances or entire circuits.
A spike protector is a type of surge suppressor that is designed to protect against short-term spikes in voltage. Spike protectors are typically less expensive than surge suppressors, but they are not as effective at protecting against long-term surges.
A UPS system is a device that provides backup power to electrical equipment in the event of a power outage. UPS systems are typically used to protect computers and other sensitive equipment.
A high-grade multi-meter is a device that is used to measure electrical current, voltage, and resistance. High-grade multi-meters are not designed to protect electrical equipment from power surges.
In conclusion, the correct answer is: A. Surge suppressor.