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