We have three blocks. Lets call them A, B and C. Block A has one medium yellow square and one medium black square. The medium yellow square is touching the bottom edge of this block. It is below the medium black square. Block B is below block A. It contains one medium blue square and a medium black square. The medium blue square is below the medium black square. To the left of block B there is block C. It contains a medium yellow square. A medium blue square is touching the bottom edge of this block. The medium yellow square is below a medium black square. The medium blue square is below the medium yellow square and the medium black square.
Which object is to the left of a medium blue 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