What would happen if an inflated balloon and a marble were dropped into 20 point a swimming pool?

a. They both have the same mass, but the balloon has greater density and it would sink while the marble would float.
b. The marble has greater density than the balloon and it would sink; the balloon would float.
c. The marble has greater mass than the balloon, but they would both float.
d. The balloon has greater density than the marble and it would float; the marble would sink