There are three blocks, A, B and C. One big blue square is in block A. Then, we have block B. It contains a small black circle. This block also has a medium blue square. This block also contains one small blue square. A big blue circle is touching the right edge of this block. Above the small blue square and the big blue circle there is the small black circle. This object is to the right of and touching the medium blue square. Finally, we have block C which is to the left of block B and above block A. It has one big black triangle. This block also has a medium black circle. The big black triangle is to the left of and below the medium black circle.
Which object is to the left of a medium blue square? the medium black circle or the small black circle?
the medium black circle  the small black circle  both of them none of them