We have three blocks, A, B and C. Two medium blue squares are in block A. Below medium blue square number two there is medium blue square number one. Then, we have block B with a medium blue square and a medium black square in it. The medium blue square is below the medium black square. Block C is above blocks A and B. It has one medium yellow square and a medium blue square. Below the medium blue square is the medium yellow square.
What is below the yellow object? a medium blue square or a medium black square?
medium blue square  medium black square  both of them none of them