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