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