There are three blocks. We call them A, B and C. There is one medium black square in block A. Then, there is block B which has one medium black square. The medium black square is below a medium blue square. Finally, to the right of block B we have block C. It is to the right of block A. It has a medium yellow square and a medium black square. The medium yellow square is touching the bottom edge of this block. It is below the medium black square.
What is to the left of the yellow thing? a medium black square which is in block B or a medium black square that is in block C?
medium black square  which is in block B medium black square  that is in block C both of them none of them