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