There are three blocks. We call them A, B and C. Block B is above block C and to the right of block A. Block A has one medium yellow square. Below a medium blue square is the medium yellow square. Block B has one medium black square. There is also one medium yellow square touching the bottom edge of this block. The medium yellow square is below the medium black square. Block C contains a medium yellow square.
What is below the blue shape? a black shape or a medium yellow square?
black shape medium yellow square  both of them none of them