There are three blocks, A, B and C. Block A is to the right of block C and it is to the left of block B. Block A contains one small black circle and one big blue square. It also contains a medium yellow triangle. The small black circle is to the right of the big blue square. The big blue square is near to, to the right of and above the medium yellow triangle. Block B contains two big blue triangles. Big blue triangle number one is touching the right edge of this block. Big blue triangle number two is touching the bottom edge of this block. Big blue triangle number one is below a medium blue triangle. Near to the medium blue triangle there is a small yellow triangle. To the right of the small yellow triangle is a medium yellow circle. The medium yellow circle is touching the bottom edge of this block. Big blue triangle number one is above and to the right of big blue triangle number two. And block C has one medium blue circle and a medium black square. The medium blue circle is to the left of the medium black square.
Which object is to the left of a big blue square? the big blue triangle that is touching the bottom edge of a block or the medium black square?
the big blue triangle  that is touching the bottom edge of a block  the medium black square  both of them none of them