We have three blocks, A, B and C. Block A has one medium yellow square. The medium yellow square is below a medium black square. Then, we have block B which contains one medium black square. Block C is below both blocks B and A. It has two medium black squares. Below medium black square number two is medium black square number one.
Which object is above a medium black square? the medium black square which is in block B or the medium black square that is in block A?
the medium black square  which is in block B the medium black square  that is in block A both of them none of them