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