According to the passage, Kinsey's work can best be characterised as ______.

A．disapprove the approach of social standing as' regards the assimilation
B．point out that assimilation has not been a benign process for Puerto Ricans
C．defend the position that emphasizes the preservation of national culture
D．indicate deficiencies in two schools of thought on the assimilation issue

A．They didn't want the author to be embarrassed.
B．They were anxious not to arouse fierce argument.
C．They became very worried about his safety.
D．They were interrupted by the doorbell rin