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