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