There are three blocks, A, B and C. Block B is below C. Block C is above A. Block A has a small black square, a big yellow triangle and a big black circle. To the left of a medium blue square is the big yellow triangle. The medium blue square is touching the right edge of this block. The big black circle is touching the bottom edge of this block. Above the big black circle is the small black square. This shape is to the right of the yellow shape which is to the left of the medium blue square. It is near to the medium blue square which is to the right of and above the big black circle. Block B has one small black circle. And block C has one medium yellow triangle and one big black square. The medium yellow triangle is to the right of the big black square. The big black square is above a small black triangle. The medium yellow triangle is touching the right edge of this block. It is above the small black triangle.
What is above the big yellow triangle? a small black square or a small black triangle?
small black square  small black triangle  both of them none of them