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