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