An Iron Block of Density ρ_Fe and of Volume L³

Multiple Choice

An iron block of density ρ_Fe and of volume l³ is immersed in a fluid of density ρ_fluid. The block hangs from a scale which reads W as the weight. The top of the block is a height h below the surface of the fluid. The correct equation for the reading of the scale is

A) W = (ρ_Fe − ρ_fluid) ghl².
B) W = (ρ_fluid − ρ_Fe) gl³.
C) W = (ρ_Fe − ρ_fluid) gl³.
D) W = (ρ_Fe + ρ_fluid) ghl².
E) W = (ρ_Fe + ρ_fluid) gl³.