题目内容
（请给出正确答案）
[主观题]
School integration plans that involve busing between suburban and central-city areas have
contributed, according to a recent study, to ______ any future need/or busing.
A．significant increases in housing integration, which, in turn, reduces
B．significant integration increases in housing, which, in turn, reduces
C．increases housing integration significantly, which, in turn, reduces
D．increases housing integration significantly, which, in turn, reduce
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