The selection says that trends are toward the______.A.growth of cities and shrinking of su

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The selection says that trends are toward the______.

A.growth of cities and shrinking of suburban areas

B.growth of both rural and suburban areas

C.shrinking of urban and suburban areas

D.growth of urban and suburban areas

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗