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