What will happen in future decades？A．The population of interracial Americans will be three
What will happen in future decades？
A．The population of interracial Americans will be three times in 2050 as much as now.
B．There will be no dominant races in America.
C．The divisiveness of the nation is an inevitable problem to confront.
D．At least 50 percent of the third-generation African Americans will marry other ethnic groups.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
细节题。本文第四段提到，到2050年，将有21％的美国人来自异族通婚家庭，而今天的比例只有7％。由此可知，虽然从比例上看是三倍的关系，但是美国人口总数在今天和2050年也是不同的。因此2050年异族通婚人数并不是现在的三倍，排除[A]。[B]与文中第二段最后一句AlmostalldiscussionfocusesonthepotentialdiVisivenessinherentinanationthatisnolongerapredominantlywhiteCOUntrywilhamostlyEuropeanancestry．相符，故人选。[C]对应第三段第一句Butafootbehindthescenesisanothertrendthat，ifhandledcarefully，couldbringthecountryclosertogetherratherthandriveitapart．由此可知，分裂并不是必然的，如果疏导合理，种族多元化不但不会使国家走向分裂，反而会使国家更加团结融合。[D]的内容在文中第四段提到了，但原文说的并不是非洲后裔而是拉美和亚洲后裔。