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