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