What is the major advantage of space-based telescopes (such as the Hubble Space Telescope) over

Earth-based telescopes?
A They are millions of miles closer to the subject.
B
They are less expensive to build and maintain.
C
They are above the Earth's atmosphere which can cause distortions.
D
They are affected less by the gravity of the Earth and the Moon.

C

They are above the Earth's atmosphere which can cause distortions.