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

A unit cube has all three dimensions equal to 1 unit, so its dimensions must have the same length in each direction. Choice A is a 1 ft. by 1 ft. by 1 ft. cube, and choice D is a 1 mm by 1 mm by 1 mm cube. Choices B and E have unequal dimensions, and choice C gives three different lengths.

AI-written and checked against the verified answer.