There are three blocks. Lets call them A, B and C. Block C is to the right of B. Block B is above A. Block A has two medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below a medium blue square. Medium black square number one is below the medium blue square and medium black square number two. Block B has one medium black square, one medium yellow square and one medium blue square. Below the medium blue square there is the medium yellow square. The medium black square is below the medium blue square and the medium yellow square. And block C contains one medium blue square.
What is above the object that is touching the bottom edge of a block? a medium black square or a medium yellow square?
medium black square  medium yellow square  both of them none of them