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