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