There are three blocks, A, B and C. Block C is below A. Block A is to the left of B. Block A contains three medium yellow squares. Medium yellow square number two is below a medium black square. Below medium yellow square number three is the medium black square. Medium yellow square number one is touching the bottom edge of this block. It is below medium yellow square number three , the medium black square and medium yellow square number two. Block B has a medium black square. Block C contains a medium black square.
Which object is below a medium yellow square? the medium black square that is in block B or the medium black square that is in block A?
the medium black square  that is in block B the medium black square  that is in block A both of them none of them