There are three blocks. We call them A, B and C. Block A contains a medium black square. Block B is to the right of block A. It has a medium blue square. Finally, we have block C above block B. It contains one medium yellow square, a medium black square and a medium blue square. The medium yellow square is touching the bottom edge of this block. Below the medium blue square is the medium black square. Below the medium blue square and the medium black square there is the medium yellow square.
Which object is to the left of a medium blue square? the medium black square which is in block A or the medium black square that is in block C?
the medium black square  which is in block A the medium black square  that is in block C both of them none of them