Here's a problem to solve: An appliance manufacturer has redesigned its original electrical fan. It has made the new fan more energy efficient. This means that the new fan

Among the 4 following options, which is the correct answer?

- A: converts more electricity into heat.
 
- B: spins at a slower rate than the original fan.
 
- C: requires more electricity than the original fan.
 
- D: reduces the percentage of heat lost to the atmosphere.
 