There are three blocks. We call them A, B and C. Block A is above B. Block C is below A. Block A has one medium yellow square. Block B contains two medium black squares. Medium black square number one is below medium black square number two. A medium yellow square is below medium black square number two and medium black square number one. And block C has one medium black square. This block also has a medium blue square. The medium black square is below the medium blue square.
Which object is below a medium yellow square? medium black square number one or the medium black square that is in block C?
medium black square  number one the medium black square  that is in block C both of them none of them