There are three blocks. We call them A, B and C. Block B is above A and block A is above C. Block A contains one medium yellow square, a medium black square and one medium blue square. Below the medium blue square is the medium yellow square. It is touching the bottom edge of this block. This object is below the medium black square.. The medium black square is below the medium blue square. Block B contains one medium black square. Block C contains one medium yellow square. Below a medium black square there is the medium yellow 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 C?
the medium black square  that is in block A the medium black square  that is in block C both of them none of them