There are three blocks, A, B and C. There is one medium black triangle in block A. Then, there is block B. It contains a big blue circle and one small black square. Below the small black square there is the big blue circle. Finally, we have block C. It is below block B and to the left of block A. It has one medium blue circle, a medium blue triangle and a big yellow triangle. The medium blue circle is below the medium blue triangle and the big yellow triangle.
Which object is above a medium blue circle? the big yellow shape or the medium black triangle?
the big yellow shape the medium black triangle  both of them none of them