There are three blocks. We call them A, B and C. Block C is above A. Block A is to the right of B. Block A contains a medium black square. A medium blue square is also touching the bottom edge of this block. The medium blue square is below the medium black square. Block B contains a medium black square. And block C has one medium blue square and one medium black square. The medium blue square is below the medium black square.
Which object is below a medium black 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