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