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