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