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