We have three blocks. We call them A, B and C. Block A contains a big blue circle. Below and to the left of a medium yellow circle there is the big blue circle. The medium yellow circle is touching the right edge of this block. Above block A is block B which has a small yellow triangle, a small black circle and a big yellow circle. The small yellow triangle is above and to the left of the big yellow circle. The big yellow circle is touching the bottom edge of this block. The small black circle is above and to the right of the big yellow circle. To the left of block B there is block C which contains one medium blue circle, a medium blue square and one small blue square. Far from the medium blue square is the medium blue circle. It is touching the bottom edge of this block. It is to the left of, near to and below the small blue square.
What is to the left of the black shape? a medium blue square or a big blue circle?
medium blue square  big blue circle  both of them none of them