There are three blocks, A, B and C. Blocks A and B are above C. Block A has a medium yellow square and a medium black square. Below the medium black square there is the medium yellow square. Block B has one medium blue square. A medium black square is touching the bottom edge of this block. It is below the medium blue square. And block C contains one medium blue square. A medium yellow square is below the medium blue square.
Which object is above a medium yellow square? the medium black square that is touching the bottom edge of a block or the medium black square which is in block A?
the medium black square  that is touching the bottom edge of a block  the medium black square  which is in block A both of them none of them