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