We have three blocks, A, B and C. There is one medium yellow square in block A. Then, we have block B. It contains one medium black square. Below a medium blue square there is the medium black square. Finally, below block B we have block C. It is to the left of block A. It has a medium blue square and one medium black square. The medium blue square is below the medium black square.
Which object is above a medium black square? the medium blue square that is in block B or the medium blue square that is in block C?
the medium blue square  that is in block B the medium blue square  that is in block C both of them none of them