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