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