We have three blocks, A, B and C. Block B is to the right of and C is below A. Block A has one medium yellow square and a medium black square. The medium yellow square is touching the bottom edge of this block. Below a medium blue square there is the medium black square. The medium yellow square is below the medium black square and the medium blue square. Block B contains one medium blue square and one medium black square. The medium blue square is below the medium black square. Block C has one medium yellow square.
Which object is above a medium yellow square? the medium black square which is in block A or the medium black square that is in block B?
the medium black square  which is in block A the medium black square  that is in block B both of them none of them