The ______ impact of reservation pressure in public libraries has been noted. All the follow- ing words can be used to modify the noun "impact" EXCEPT ______.

A．it is by no means easy to live in this modern age
B．life is complicated and challenging
C．life needs the advancement of technology
D．to live well requires living happily and meaningfully

A．Distinction between city and rural life.
B．Cooperation and collectivism.
C．Diversity in customs and familial relations.
D．Immigration from all over the worl