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
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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