We have three blocks. We call them A, B and C. Block A has two small black triangles. Small black triangle number one is touching the right edge of this block. A medium yellow circle is also in this block. One medium black square is also touching the bottom edge of this block. A big black circle is touching the bottom edge of this block. Above small black triangle number two is the medium yellow circle. A big blue triangle is touching the right edge of this block. This shape is above and to the right of the medium black square. The big black circle is below small black triangle number two and the medium yellow circle. Above block A is block B with one big black square in it. Finally, we have block C. It is below block A. It contains one big yellow triangle. This block also has a small yellow triangle. To the right of the small yellow triangle there is the big yellow triangle.
What is below the big black square? a small yellow triangle or a medium black square?
small yellow triangle  medium black square  both of them none of them