A. 6 cm2

B. 6 mm2

C. 60 cm2

D. 60 mm2

E. 600 cm2

The right answer is 60 cm2. I don't know how to derive this answer. When I work it out I get 6cm2. This is because

one cubic centimeter (1 cc) / 1000 cubic millimeter units =

1cm3/1000cm3 = 1

and to get the surface area, multiply by 6.

What am I doing wrong, anyone know how to get the right answer?