The areas of the three adjacent faces of a rectangular box which meet in a point are known. The product of these areas is equal to :___________?

A. the volume of the box
B. twice the volume of the box
C. the square of the volume of the box
D. the cube root of the volume of the box

Let length = 1, breadth = b and height = h. Then,
Product of areas of 3 adjacent faces = (lb x bh x 1h) = (lbh)² = (Volume)².