We have three blocks, A, B and C. Block B is above and C is to the left of A. Block A has one medium black square. Block B contains a medium black square. Block C contains one medium yellow square and a medium blue square. One medium black square is also in this block. The medium yellow square is below the medium blue square and the medium black square. Below the medium black square there is the medium blue square.
Which object is above a medium black square? the medium black square that is in block B or the medium black square that is in block C?
the medium black square  that is in block B the medium black square  that is in block C both of them none of them