There are three blocks. We call them A, B and C. Block B is to the left of C and block C is below A. Block A has a medium yellow square and one medium black square. The medium yellow square is below the medium black square. Block B contains a medium yellow square. Block C contains a medium blue square and one medium yellow square. The medium blue square is below the medium yellow square.
What is below the black thing? a medium yellow square or a blue object?
medium yellow square  blue object both of them none of them