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