Which of the following statement is correct?

A.The speed of Planet is faster when they are nearer to the sun and slower when they are farther away from the sun.

B.The speed of Planet is faster when they are farther from the sun and slower when they are nearer to the sun.

C.The speed of Planet is same when they are nearer to the sun or farther away from the sun.

D.The speed of Planet is faster when they are nearer to the sun or farther away from the sun.