To reduce utility bills, which method is recommended?

• A. Install a solar panel system.
• B. By installing a programmable thermostat to save on heating and cooling costs.
• C. Purchase more high-energy appliances.
• D. Keep thermostat at extreme temperatures.

Answer: (B)

The main idea here is driving energy savings by smartly controlling heating and cooling. A programmable thermostat is the best choice because it automatically lowers or raises the temperature during times you don’t need comfort—like when you’re asleep or away from home. By reducing how long the HVAC system runs at full power, you cut the largest portion of many utility bills without sacrificing daily comfort.

Solar panels can reduce electricity costs, but they require upfront investment and depend on location and weather, so they aren’t as reliable for immediate, universal savings. Buying more high-energy appliances will typically raise energy use rather than reduce it. Keeping the thermostat at extreme temperatures makes the HVAC work harder, which increases bills rather than lowers them.