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