There are three blocks. We call them A, B and C. Block A contains a medium black square. Block B is below block A. It contains one medium yellow square and one medium black square. The medium yellow square is below the medium black square. Finally, there is block C to the left of block B. It has a medium black square. A medium blue square is below the medium black square.
What is to the left of the yellow object? a medium black square which is in block A or a medium black square that is in block B?
medium black square  which is in block A medium black square  that is in block B both of them none of them