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