There are three blocks, A, B and C. One medium blue square, one medium black square and one medium yellow square are in block A. Below the medium yellow square and the medium black square is the medium blue square. The medium black square is below the medium yellow square. Then, we have block B which contains one medium yellow square. Finally, we have block C which is below block A and to the left of block B. It contains a medium yellow square. A medium blue square is below a medium black square.. The medium yellow square is touching the bottom edge of this block. It is below the medium blue square and the medium black square.
Which object is below a medium black square? the medium blue square which is in block A or the medium blue square that is in block C?
the medium blue square  which is in block A the medium blue square  that is in block C both of them none of them