There are three blocks. We call them A, B and C. Block B is below C. Block C is to the right of A. Block A has one medium blue square and a medium black square. The medium blue square is touching the bottom edge of this block. A medium yellow square is below the medium black square.. Below the medium yellow square and the medium black square is the medium blue square. Block B contains a medium blue square. And block C contains one medium black square. A medium yellow square is also in this block. Below the medium yellow square there is the medium black square.
Which object is below a medium yellow square? the medium black square that is in block C or the medium black square that is in block A?
the medium black square  that is in block C the medium black square  that is in block A both of them none of them