Here's a problem to solve: There are four seasons in a year. Which reason is most responsible for the changing seasons on Earth?

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

- A: the way Earth tilts on its axis
 
- B: the way Earth rotates on its axis
 
- C: changes in the distance between Earth and the Sun
 
- D: changes in the amount of energy the Sun produces
 