A Block of Wood of Mass 300 G and Density

Multiple Choice

A block of wood of mass 300 g and density 0.75 g/cm³ is floating on the surface of a liquid of density 1.1 g/cm³.What mass of lead (density = 11.3 g/cm³) must be added to the block in order for the combination just to be submerged?

A) 440 g
B) 820 g
C) 140 g
D) 155 g
E) none of the above