There are three blocks. We call them A, B and C. Block A contains a medium blue square. To the left of block A is block B. It contains one medium black square. Below block A there is block C with two medium yellow squares in it. Medium yellow square number one is below a medium blue square and a medium black square. It is touching the bottom edge of this block. Below medium yellow square number two and the medium black square there is the medium blue square. Below medium yellow square number two is the medium black square.
Which object is below a medium black square? the medium blue square that is in block A or the medium blue square that is in block C?
the medium blue square  that is in block A the medium blue square  that is in block C both of them none of them