There are three blocks, A, B and C. A medium yellow circle is in block A. Above block A there is block B with a big yellow square in it. Finally, we have block C to the right of block B. It contains a small yellow square, a medium blue square and one big yellow circle. The small yellow square is below and to the left of the medium blue square which is above the big yellow circle. A big black square is to the left of and above the big yellow circle.
What is to the left of the blue object? a black object or a big yellow square?
black object big yellow square  both of them none of them