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