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