There are three blocks, A, B and C. Block A is above C and block C is above B. Block A has a medium yellow circle. Block B contains a big black circle. One big black square is also in this block. The big black square is far from the big black circle. Block C has one medium blue square and one small blue circle. Below the small blue circle there is the medium blue square.
What is below the yellow object? a big black circle or a small thing?
big black circle  small thing both of them none of them