We have three blocks. We call them A, B and C. Block A has a big blue square. Above a big blue circle is a big black triangle. The big blue square is touching the bottom edge of this block. The big blue circle is touching the right edge of this block. The big black triangle is touching the big blue square. To the left of the big blue circle is the big blue square. Then, we have block B. It contains one medium yellow square. Finally, to the left of block B we have block C. It is below block A. It has one small black square.
What is above the black square? a medium yellow square or a thing that is touching the bottom edge of a block?
medium yellow square  thing that is touching the bottom edge of a block  both of them none of them