Here's a problem to solve: How do coal and the sun compare as sources of energy?

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

- A: Coal is renewable, and the sun is renewable.
 
- B: Coal is renewable, and the sun is nonrenewable.
 
- C: Coal is nonrenewable, and the sun is renewable.
 
- D: Coal is nonrenewable, and the sun is nonrenewable.
 