单项选择题
A．was something unheard of B．attracted a lot of public attention C．was by no means a rare occurrence D．began to appear in analysts' data
A．Great mobility. B．Emphasis on individual effort. C．Concern for one's neighbor. D．Ever-weakening social bonds.
A．its growing wealth B．the self-centeredness of individuals C．underestimating the impact of social changes D．the prejudice against women and minorities