We have three blocks. We call them A, B and C. Two medium blue squares are in block A. Medium blue square number one is below a medium black square and medium blue square number two. Medium blue square number one is touching the bottom edge of this block. The medium black square is below medium blue square number two. Block B is below block A. It contains a medium yellow square. A medium blue square is touching the bottom edge of this block. This object is below the medium yellow square. Below block B there is block C with two medium blue squares in it. Medium blue square number one is below medium blue square number two.
What is below the yellow thing? a medium blue square that is touching the bottom edge of a block or a medium black square?
medium blue square  that is touching the bottom edge of a block  medium black square  both of them none of them