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