Here's a problem to solve: Which of the following best shows the basic three-step energy transformation for a battery-operated radio?

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

- A: Acoustical -> Mechanical -> Electrical
 
- B: Mechanical -> Acoustical -> Chemical
 
- C: Chemical -> Electrical -> Acoustical
 
- D: Electrical -> Acoustical -> Chemical
 