If the Earth's Orbit Around the Sun Were Increased to a Radius

If the Earth's orbit around the Sun were increased to a radius twice what it is now.Which of the following is true?

A) The force of gravity on the Earth due to the Sun would decrease by a factor of four.
B) The force of gravity on the Earth due to the Sun would decrease by a factor of two.
C) The force of gravity on the Sun due to the Earth would decrease by a factor of four.
D) The force of gravity on the Sun due to the Earth would decrease by a factor of two.
E) Both A and C are true.

Correct Answer:

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