There are three blocks. We call them A, B and C. There is a medium yellow square in block A. This block also contains one medium black square. The medium black square is below the medium yellow square. Above block A there is block B. It has one medium yellow square. Above block B there is block C which has one medium yellow square. The medium yellow square is below a medium black square.
Which object is above a medium black square? the medium yellow square that is in block C or the medium yellow square that is in block A?
the medium yellow square  that is in block C the medium yellow square  that is in block A both of them none of them