Given: <img src="/Image1/08/08de727e0f00655c50826d5db342c525.jpg" /> Which code, inserted at line 4, guarantees that this program will output [1, 2]（）? A:Set set = new TreeSet(); B:Set set = new HashSet(); C:Set set = new SortedSet(); D:List set = new SortedList(); E:Set set = new LinkedHashSet();

Given:

Which code, inserted at line 4, guarantees that this program will output [1, 2]（）?
A:Set set = new TreeSet();
B:Set set = new HashSet();
C:Set set = new SortedSet();
D:List set = new SortedList();
E:Set set = new LinkedHashSet();

出自：Oracle认证

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