We have three blocks. We call them A, B and C. One medium blue square is in block A. A medium black square is also touching the bottom edge of this block. The medium black square is below the medium blue square. Above block A there is block B with one medium yellow square in it. It also contains a medium blue square. The medium yellow square is touching the bottom edge of this block. This object is below the medium blue square. Above block B there is block C. It contains a medium black square. A medium yellow square is touching the bottom edge of this block. It is below the medium black square.
Which object is below a medium yellow square? the medium black square that is in block C or the medium black square that is touching the bottom edge of a block?
the medium black square  that is in block C the medium black square  that is touching the bottom edge of a block  both of them none of them