We have three blocks, A, B and C. Block B is below C. Block A is to the left of B. Block A contains one medium black square. Block B has one medium yellow square. It also has a medium blue square. Below the medium blue square there is the medium yellow square. Block C contains two medium blue squares. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two.
What is above the yellow object? a medium black square or a medium blue square?
medium black square  medium blue square  both of them none of them