There are three blocks, A, B and C. A medium blue square is in block A. Above block A is block B with two medium black squares in it. Medium black square number one is below a medium blue square and medium black square number two. It is touching the bottom edge of this block. The medium blue square is below medium black square number two. Finally, we have block C. It is below block B. It contains a medium yellow square.
What is above the yellow thing? a thing which is touching the bottom edge of a block or a medium blue square?
thing which is touching the bottom edge of a block  medium blue square  both of them none of them