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