We have three blocks, A, B and C. Block A has one medium blue square and a medium yellow square. Below the medium yellow square there is the medium blue square. Block B is below block A. It contains a medium blue square. Finally, we have block C to the left of block B. It contains two medium blue squares. Below medium blue square number one is a medium black square. Medium blue square number one is below medium blue square number two. The medium black square is below medium blue square number two.
Which object is above a medium blue square? the medium yellow square or the black thing?
the medium yellow square  the black thing both of them none of them