6. As shown in Fig.3, a block of density $\rho{B}$ floats in a fluid of density $\rho{w}$ with a submerged depth of h in static equilibrium. The block has height H and face area A. The fluid container is placed upon a scale. If the block is pushed downward by a force F (with its upper face remaining above the fluid surface), which statement correctly describes the change in the scale reading?
(A) It increases more than F.
(B) It equals to F.
(C) It increases but smaller than F.
(D) It equals to the buoyant force of the block.
(E) It equals to 0. (Figure 3 shows a block floating in a fluid, with a force F pushing down on it. The fluid container is on a scale.)