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