We have three blocks, A, B and C. Block C is above B. Block B is to the left of A. Block A has one small blue triangle. Block B has one small blue triangle and one small black square. A big black square is to the right of and below the small black square. The small blue triangle is touching the right edge of this block. It is to the right of and below the small black square. And block C contains a small blue triangle and one small black triangle. The small black triangle is touching the right edge of this block. To the left of and below the small black triangle is the small blue triangle.
Which object is below a small blue triangle? the small black triangle or the small black square?
the small black triangle  the small black square  both of them none of them