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