We have three blocks. We call them A, B and C. Block A has one medium black square and a medium blue square. Below the medium blue square there is the medium black square. Block B is to the left of block A. It has a medium yellow square, a medium black square and a medium blue square. The medium yellow square is touching the bottom edge of this block. Below the medium blue square there is the medium black square. Below the medium black square and the medium blue square there is the medium yellow square. Above block B there is block C. It has one medium blue square.
Which object is to the left of a medium black square? the medium blue square which is in block C or the medium blue square which is in block A?
the medium blue square  which is in block C the medium blue square  which is in block A both of them none of them