We have three blocks. We call them A, B and C. There is one medium blue square in block A. Then, we have block B with a big black square and a small blue triangle in it. The big black square is above the small blue triangle. To the left of both blocks B and A there is block C with one small blue circle and one big blue triangle in it. There is also a big yellow square touching the right edge of this block. The big yellow square is near to and below the small blue circle. This object is below the big blue triangle.
What is to the left of the medium object? a big blue triangle or a big black square?
big blue triangle  big black square  both of them none of them