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