We have three blocks. We call them A, B and C. A medium black square is in block A. Then, we have block B with a medium blue square, one medium yellow square and one medium black square in it. 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. Finally, below block A we have block C which is above block B. It contains a medium blue square.
Which object is below a medium blue square? the medium black square that is in block B or the medium black square that is in block A?
the medium black square  that is in block B the medium black square  that is in block A both of them none of them