Which of these could be the dimensions of a unit cube? Select all that apply.

A. 1 ft. by 1 ft. by 1 ft.
B. 1 in. by 2 in. by 1 in.
C. 1 ft. by 1 in. by 1 cm
D. 1 mm by 1 mm by 1 mm
E. 1 m by 1 m by 2 m