We have three blocks, A, B and C. Block A has a medium blue square and one medium yellow square. The medium blue square is touching the bottom edge of this block. This shape is below the medium yellow square. Block B is below block A. It contains one medium yellow square. This block also has a medium black square. The medium yellow square is touching the bottom edge of this block. This object is below the medium black square. Above block A there is block C which contains one medium yellow square and one medium black square. Below the medium black square there is the medium yellow square.
Which object is below a medium square? the medium black square that is in block C or the medium black square which is in block B?
the medium black square  that is in block C the medium black square  which is in block B both of them none of them