There are three blocks, A, B and C. Block B is to the right of A and block C is below B. Block A contains a medium black square and one medium blue square. The medium black square is touching the bottom edge of this block. It is below the medium blue square. Block B contains a medium yellow square. Block C contains two medium black squares. Below medium black square number two is medium black square number one. It also contains one medium yellow square. It is below medium black square number two. Medium black square number one is touching the bottom edge of this block. It is below the medium yellow square.
Which object is above a medium black square? the medium yellow square which is in block B or the medium yellow square that is in block C?
the medium yellow square  which is in block B the medium yellow square  that is in block C both of them none of them