There are three blocks, A, B and C. Block A contains a medium blue square. This block also contains a medium yellow square. The medium blue square is below the medium yellow square. Above block A is block B with two medium blue squares in it. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two. Finally, there is block C. It is to the left of block A. It contains a medium black square.
Which object is above a medium blue square? the medium black square or the yellow object?
the medium black square  the yellow object both of them none of them