We have three blocks, A, B and C. Block A contains a big yellow square. Then, there is block B with a big black triangle in it. Block C is below both blocks B and A. It contains one medium black square and a big black triangle. Below a big yellow square there is the big black triangle. The medium black square is below the big yellow square and the big black triangle.
Which object is above a black square? the big yellow square that is in block A or the big yellow square which is in block C?
the big yellow square  that is in block A the big yellow square  which is in block C both of them none of them