Here's a problem to solve: Household appliances convert electricity into one or more different forms of energy. An electric fan can best be described as converting electricity into

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

- A: heat energy only
 
- B: heat energy and sound energy only
 
- C: heat energy, sound energy, and mechanical energy only
 
- D: heat energy, sound energy, mechanical energy, and chemical energy
 