There are three blocks, A, B and C. One medium black square is in block A. Block B is below block A. It has one medium blue square and a medium black square. The medium blue square is below the medium black square. Finally, we have block C. It is above block B. It has one medium blue square, a medium yellow square and a medium black square. The medium yellow square is below the medium black square. The medium blue square is below the medium yellow square and the medium black square.
Which object is above a medium blue square? the medium black square that is in block C or the medium black square that is in block A?
the medium black square  that is in block C the medium black square  that is in block A both of them none of them