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