There are three blocks, A, B and C. Block C is below B. Block A is above C. Block A contains a medium blue square. Block B has a medium yellow square and one medium black square. Below the medium black square there is the medium yellow square. Block C contains one medium black square and one medium blue square. Below the medium blue square is the medium black square.
Which object is above a medium blue 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