We have three blocks, A, B and C. Block C is below block A and above block B. Block A has one medium blue square and one medium black square. The medium blue square is touching the bottom edge of this block. This object is below the medium black square. Block B has a medium black square. And block C contains a medium yellow square. This block also has a medium black square. The medium yellow square is touching the bottom edge of this block. It is below the medium black square.
What is below the yellow thing? a medium black square or a medium blue square that is touching the bottom edge of a block?
medium black square  medium blue square  that is touching the bottom edge of a block  both of them none of them