mass and volume volume and length of day distance from the Sun and mass length of day and distance from the Sun
I gave my students this multiple choice question: Which two characteristics affect a planet's gravitational attraction to the Sun?

Only one answer is correct among these 4 choices:
- mass and volume
- volume and length of day
- distance from the Sun and mass
- length of day and distance from the Sun

Could you tell me which one is correct?

distance from the Sun and mass