Here's a problem to solve: A scientist studying outer space makes a calculation of 4.3 light-years. What does this calculation most likely represent?

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

- A: distance between Earth and the Sun
 
- B: time of rotation of the nearest galaxy
 
- C: time in orbit of a satellite around Earth
 
- D: distance between the Sun and the nearest star
 