There are three blocks, A, B and C. Block C is to the left of and A is above B. Block A has three medium black squares. Medium black square number one is below a medium blue square and medium black square number three. Below medium black square number three is medium black square number two. Medium black square number one is touching the bottom edge of this block. The medium blue square is below medium black square number three and medium black square number two. Block B has one medium blue square. And block C has a medium blue square and one medium yellow square. The medium blue square is touching the bottom edge of this block. It is below the medium yellow square.
Which object is to the left of a medium blue square? the medium black square that is touching the bottom edge of a block or the medium yellow square?
the medium black square  that is touching the bottom edge of a block  the medium yellow square  both of them none of them