There are three blocks, A, B and C. There is one medium black square in block A. Block B is below block A. It has one medium blue square and one medium yellow square. The medium blue square is touching the bottom edge of this block. The medium yellow square is below a medium black square. The medium blue square is below the medium yellow square and the medium black square. Finally, there is block C below block A. It has a medium black square.
Which object is below a medium black square? the medium black square which is in block C or the medium black square that is in block B?
the medium black square  which is in block C the medium black square  that is in block B both of them none of them