We have three blocks, A, B and C. One medium yellow square is in block A. To the right of block A we have block B. It has one medium blue square and a medium yellow square. It also contains one medium black square. The medium blue square is touching the bottom edge of this block. It is below the medium yellow square and the medium black square. Below the medium black square there is the medium yellow square. Finally, there is block C which is above block B. It contains a medium yellow square.
What is to the left of the blue object? a medium black square or a medium yellow square?
medium black square  medium yellow square  both of them none of them