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