mercury, venus, earth, mars, jupiter, saturn, uranus, neptune.

based on this order, which of the following is true of neptune?

  a. 

it must travel in the opposite direction around the sun than earth does.

  b. 

it travels a shorter distance than earth does to complete one orbit around the sun.

  c. 

it travels the same distance as earth does to complete one orbit around the sun.

  d. 

it must travel farther than earth does to complete one orbit around the sun.