Jack unfolded a cardboard box. The figure of the unfolded box is shown below:
Which expression can be used to calculate the area of cardboard, in square inches, that was used to make the box?
A.8 x 6 x 6
B. 6 x 4 x 4
C. 4 x 6 x 6
D. 6 x 8 x 8
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