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