Which of the following affects the speed of a planet's revolution?

Shape of the planet

Gravity of the sun

Temperature of the sun

Atmosphere of the planet

I believe it's A. Shape of the planet. Sorry if i'm wrong.

I would say B) because the rest dosnt quite make sense to me and A) the gravity of the sun would still be the same despite the shape if we have an triangle block and an sphere then drop the they are going to drop at the same speed the gravity is not going to sphere is not going to fall faster