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