We have three blocks. We call them A, B and C. Block C is above A. Block A is above B. Block A has a medium black square. Block B has a medium yellow square. Block C contains two medium black squares. Below a medium yellow square and medium black square number two there is medium black square number one. Below medium black square number two there is the medium yellow square.
Which object is above a medium black square? the medium yellow square that is in block C or the medium yellow square that is in block B?
the medium yellow square  that is in block C the medium yellow square  that is in block B both of them none of them