Three blocks are shown: Block A has mass 3 kilograms, length 7 centimeters, height 3 centimeters, and width 1 centimeter. Block B has mass 4 kilograms, length 7 centimeters, height 1 centimeter, and width 3 centimeters. Block C has mass 2 kilograms, length 1 centimeter, height 7 centimeters, and width 3 centimeters. Which statement is correct? Block A has the greatest density. Block B has the greatest density. The density of Block A is equal to the density of Block B. The density of Block B is equal to the density of Block C.