There are three blocks, A, B and C. Block A has two medium black squares. Medium black square number one is touching the bottom edge of this block. It is below medium black square number two. Then, we have block B which has a medium black square and a medium blue square. The medium black square is touching the bottom edge of this block. This object is below the medium blue square. Block C is below block A and to the left of block B. It contains one medium yellow square.
What is above the yellow shape? a medium black square or a blue shape?
medium black square  blue shape both of them none of them