There are three blocks, A, B and C. Blocks C and A are below B. Block A contains one medium black square. Block B has a medium blue square. It also contains one medium yellow square. Below the medium blue square there is the medium yellow square. Block C has a medium yellow square and one medium blue square. The medium yellow square is below the medium blue square.
What is below the thing that is touching the bottom edge of a block? a medium blue square or a black shape?
medium blue square  black shape both of them none of them