There are three blocks, A, B and C. Block A contains a medium blue square. This block also contains a medium yellow square. The medium blue square is below the medium yellow square. Above block A is block B with two medium blue squares in it. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two. Finally, there is block C. It is to the left of block A. It contains a medium black square.
Which object is to the left of a medium blue square? the medium yellow square or the black object?
the medium yellow square  the black object both of them none of them