There are three blocks. We call them A, B and C. A small blue triangle, a small blue square and one big blue circle are in block A. The small blue triangle is touching the bottom edge of this block. It is below and to the left of the small blue square. The small blue square is above the big blue circle. Then, there is block B which contains a medium black square. Above block A and to the left of block B there is block C with a big blue circle in it.
Which object is below a big blue circle? the small blue square or the medium black square?
the small blue square  the medium black square  both of them none of them