There are three blocks, A, B and C. Block A is above blocks B and C. Block A contains one medium black triangle. Block B contains one big yellow square and a big black square. A big black triangle is touching the right edge of this block. The big black square is touching the right edge of this block. The big yellow square is below the big black square. Below the big black square is the big black triangle. To the left of and above the big black triangle there is the big yellow square. And block C has a small yellow triangle.
Which object is below a black triangle? the big black square or the small thing?
the big black square  the small thing both of them none of them