There are three blocks, A, B and C. Block A has a medium yellow square and a medium blue square. Below the medium blue square there is the medium yellow square. Then, there is block B with two medium black squares in it. A medium blue square is touching the bottom edge of this block. It is below medium black square number two and medium black square number one. Medium black square number one is below medium black square number two. Block C is below block A and block B is to the left of it. It contains one medium yellow square. Below a medium black square there is the medium yellow square.
What is above the thing which is touching the bottom edge of a block? a medium black square that is in block C or a medium black square number two?
medium black square  that is in block C medium black square  number two both of them none of them