Which code, inserted at line 4, guarantees that this program will output [1, 2]?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080116202045692.jpg?sign=d189bcfcd4de927722ea243ff710ca39&t=62d1ea85" />
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();