    Sentence. 1; -What does   Rosenfield féel plays *the most.  significant. rele '-in expanding  the. income. gap? :    Sentence .2:-He points out ‘that  nations ‘with: high: rates “oF  unionization, particularly. : in  Scandinavia, . have -very” "lew  levels: “of ‘inequality ;,” ‘ahd  conéludes. "the’’ historical  pattern : is clear; ‘the Jeross—