Mouthwashes are not effective cure for bad breath mainly becauseA．they can"t cover the thi
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Mouthwashes are not effective cure for bad breath mainly because
A．they can"t cover the thick layers of mucus.
B．they can"t get to all the offending bacteria.
C．they can"t mask the bad odor long enough.
D．their strong smell mixes with bad breath and makes it worse.
请帮忙给出正确答案和分析，谢谢！
更新中~-
正确答案：B
结尾段落，作者给出了漱口水在对付badbreath方面作用并不好的原因——theydon’tnecessarilyreachalloffendinggerms“它们不能触及所有引起口奥的细菌”，[B]正确。