There are three blocks. We call them A, B and C. Block A has one medium black square. Then, there is block B with a medium yellow square in it. It also contains a medium blue square. The medium yellow square is below the medium blue square. Block C is below block A and block B is above it. It has one medium blue square. One medium yellow square is also touching the bottom edge of this block. Below the medium blue square is the medium yellow square.
What is above the shape that is touching the bottom edge of a block? a medium blue square or a medium black square?
medium blue square  medium black square  both of them none of them