Don't leave only the answer, please also advise or clarify for me the relationship between density and its volume and mass, thanks!

Which of the following is true? a) If you have twice the volume of a substance, you have half the density as well. b) If you have twice the mass of a substance, you have twice the volume as well. C) If you have twice the mass of a substance, you have twice as much density as well. d) If you divide an object in half, you have half the mass and half the volume, but twice the density. e) If you divide an object in half, you have half the mass and twice the volume, and the same density