A solid with at most one base cannot be which of the following?

A) cone
B) cube
C) pyramid
D) sphere

Is it A or D?
MS SUE PLEASE HELP ME

5 answers

http://www.google.com/search?output=search&sclient=psy-ab&q=sphere&btnG=
Looks like B to me.

a cone and a pyramid have exactly one base.
a sphere has 0 bases, which is also 1 or less.

A cube has 6 faces, any of which could be called a base.
But the question asks which one does NOT have a base.
so the answer is D)
The answer is B because cubes have more than one base