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单选题
set collection遇到重复的元素，处理的方式是（）。
A
试图添加一个重复的元素时，会抛出一个异常
B
试图添加一个重复的元素时，重复元素将不能被加入
C
一个set可以包含重复元素
D
编译的时候，重复的元素会导致错误
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set collection遇到重复的元素，处理的方式是（）。A、试图添加一个重复的元素时，会抛出一个异常B、试图添加一个重复的元素时，重复元素将不能被加入C、一个set可以包含重复元素D、编译的时候，重复的元素会导致错误
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On Wednesday， the statistics have been purged.B
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