There are three blocks. We call them A, B and C. There are a medium yellow square, one medium blue square and one medium black square in block A. The medium yellow square is touching the bottom edge of this block. It is below the medium black square and the medium blue square. The medium blue square is below the medium black square. Then, there is block B with a medium black square in it. Finally, to the left of block A we have block C. It is below block B. It contains a medium yellow square.
Which object is above a medium yellow 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