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