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