We have three blocks, A, B and C. One medium yellow square is in block A. The medium yellow square is touching the bottom edge of this block. This block also has a medium blue square. The medium yellow square is below the medium blue square. Block B is to the right of block A. It contains a medium blue square. To the right of block A there is block C. 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.
What is below the black shape? a medium blue square that is in block B or a medium blue square that is in block A?
medium blue square  that is in block B medium blue square  that is in block A both of them none of them