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

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

Is the answer B?

I had said a cube up at the very top. You said your not here to feed answers. All you had to say was YES!!!!!

A CUBE!!!!!!

YES !!!!

I got it a bit backwards, my bad. Cube is correct.

A cube has 6 potential bases in my opinion.

So is B the correct answer?

NO

a cone has one base
a pyramid has one base

we need something with multiple bases

If it has ONE base it CANNOT be

but I would not because I was not convinced you knew why.

At most one means it can't be more than one. It would have to be a cone.