According to the solar nebula theory, what is the best reason why...?

Question

... the inner planets have very thin or nonexistent atmospheres?

a. The gravity of the Sun blew away the gasses that would have formed thick atmospheres around the inner planets.

b. The inner planets formed after most of the gas was gone.

c. As the Sun began to shine, the solar wind blew away the gas that had undoubtedly collected around the inner planets.

d. The pull of Jupiter's gravity was too great for the inner planets to keep their atmospheres.

e. The impact of asteroids and comets blew away the early atmospheres of the inner planets.

Answer 1

The answer's C, but the question's wrong.

Answer 2

Actually, Mercury is probably the only planet in our solar system with a very thin atmosphere.  Venus, Earth and Mars have thicker atmospheres, and my answer to your question would be "b", but only in Mercury's case.