There are three blocks, A, B and C. Block A has a medium blue square and a medium black square. The medium blue square is below the medium black square. Then, there is block B with one medium yellow square in it. Finally, below block B we have block C. It is below block A. It has a medium yellow square. The medium yellow square is below 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 A?
the medium black square  that is in block C the medium black square  that is in block A both of them none of them