How Would You Determine the Density of an Irregular Object

How would you determine the density of an irregular object?

A) It would be impossible to determine the mass of the object without more information.
B) D = m/v, so measure the mass of the object using a balance. Then to find volume, measure the height, width, and length using an appropriate measuring tool.
C) D = m/v, so measure the mass of the object using a balance. Then to find volume, fill a graduated cylinder with a known amount of water and immerse the object in the water. The amount of displaced water is the volume in cm³ or mL.