现有:importjava.util.*;classAddStuff2{publicstaticvoidmain(String[]args){TreeSett=newTreeSet();if(t.add("one"))if(t.add("two"))if(t.add("three"))add("four");for(Strings:t)System.out.print(s);}}结果为:()
A.one
B.onethreetwo
C.onetwothree
D.onetwothreefour
E.fouronethreetwo
F.编译失败