There are three blocks. Lets call them A, B and C. Block C is below blocks A and B. Block A has a medium blue square. The medium blue square is below a medium black square. Block B has a medium yellow square. And block C contains one medium yellow square. A medium black square is touching the bottom edge of this block. It is below the medium yellow square.
What is above the thing that is touching the bottom edge of a block? a blue thing or a medium yellow square?
blue thing medium yellow square  both of them none of them