Water goes into the sky by condensation I think
Multiply the volume and density together. Multiply your two numbers together, and you'll know the mass of your object. Keep track of the units as you do this, and you'll see that you end up with units of mass (kilograms or grams). Example: We have a diamond with volume 5,000 cm3 and density 3.52 g/cm3
I believe the correct answer is C, but I'm 100% on this. Hope this helped though!
-TTL