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