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