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