We have three blocks. We call them A, B and C. Two medium yellow squares are in block A. Below medium yellow square number two is medium yellow square number one. It is touching the bottom edge of this block. It is below a medium black square which is below medium yellow square number two. Block B is above block A. It has one medium yellow square. The medium yellow square is touching the bottom edge of this block. There is also one medium blue square in this block. The medium yellow square is below the medium blue square. To the right of block A there is block C. It has one medium yellow square.
What is below the blue thing? a medium yellow square or a medium black square?
medium yellow square  medium black square  both of them none of them