According to the passage, the thing that the film has NOT touched upon is ______

A．The sequence of the film is reasonably smooth in itself.
B．The film has many challenges from beginning to end.
C．The film is confusing at the beginning but clearer later.
D．The film is filed with the hearings in its court scenes.

A．Generally the South is seen as the depths of racism.
B．The three white Canadians themselves are not racists.
C．The letters between Lesra and Hurricane help Rubin.
D．The book exonerates Rubin from his imprisonment.