There are three blocks. We call them A, B and C. Block B is above block C and to the right of block A. Block A has a medium yellow square. This block also has a medium black square. The medium yellow square is below the medium black square. Block B contains one medium blue square. And block C contains one medium black square and a medium yellow square. The medium black square is below the medium yellow square.
What is to the left of the blue shape? a medium black square which is in block A or a medium black square that is in block C?
medium black square  which is in block A medium black square  that is in block C both of them none of them