We have three blocks, A, B and C. Block C is below block A and to the left of block B. Block A has a medium yellow square and a medium black square. The medium yellow square is touching the bottom edge of this block. This object is below the medium black square. Block B has a medium blue square, a medium yellow square and a medium black square. The medium yellow square is below the medium black square. Below the medium yellow square and the medium black square is the medium blue square. And block C contains one medium black square and a medium yellow square. The medium black square is below the medium yellow square.
Which object is above a medium yellow 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