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