There are three blocks, A, B and C. Block A has one medium blue square and a medium black square. The medium blue square is touching the bottom edge of this block. It is below the medium black square. Above block A is block B which contains two medium black squares. Below medium black square number two is medium black square number one. Above block A there is block C. It contains a medium yellow square.
What is above the blue shape? a yellow thing or a medium black square?
yellow thing medium black square  both of them none of them