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