We have three blocks. We call them A, B and C. Block A has a medium yellow square. Above block A there is block B. It has two medium black squares. Below a medium yellow square and medium black square number two is medium black square number one. This shape is touching the bottom edge of this block. The medium yellow square is below medium black square number two. Above block A there is block C. It contains one medium blue square.
Which object is below a medium black square? the medium yellow square that is in block B or the medium yellow square which is in block A?
the medium yellow square  that is in block B the medium yellow square  which is in block A both of them none of them