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