There are three blocks, A, B and C. Block C is above B and block B is above A. Block A contains a medium blue square, one medium yellow square and a medium black square. The medium blue square is touching the bottom edge of this block. Below the medium black square there is the medium yellow square. The medium blue square is below the medium yellow square and the medium black square. Block B has one medium blue square and a medium yellow square. Below the medium yellow square is the medium blue square. And block C has a medium black square.
Which object is above a medium yellow square? the medium black square that is in block C or the medium black square which is in block A?
the medium black square  that is in block C the medium black square  which is in block A both of them none of them