We have three blocks, A, B and C. Block C is to the left of and B is to the right of A. Block A has one medium blue square and one medium black triangle. A medium blue triangle is to the right of the medium black triangle. This shape is touching the right edge of this block. The medium blue square is above the medium blue triangle and the medium black triangle. Block B contains a small black triangle. There is also a small blue triangle in this block. The small blue triangle is to the left of and below the small black triangle. Block C has one medium blue circle and one medium black triangle. The medium blue circle is below the medium black triangle. The medium black triangle is touching the right edge of this block.
What is to the left of the small blue triangle? a medium blue square or a medium black triangle?
medium blue square  medium black triangle  both of them none of them