There are three blocks. Lets call them A, B and C. Block A contains a medium black square. The medium black square is below a medium blue square. Above block A we have block B with one medium black square in it. Above block A there is block C. It contains a medium blue square, a medium yellow square and a medium black square. The medium blue square is touching the bottom edge of this block. The medium yellow square is below the medium black square. The medium blue square is below the medium yellow square. This object is below 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