There are three blocks. We call them A, B and C. A medium blue square and one medium black square are in block A. Below the medium black square there is the medium blue square. Then, there is block B which contains a medium yellow square and one medium black square. Below the medium black square there is the medium yellow square. Below block A and to the left of block B there is block C with a medium black square in it.
Which object is above 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