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