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