A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0, object), but does NOT need to support quick random access. What supports these requirements?（）

单项选择题Given: Which method will complete this class?（）

A.public int compareTo(Object o){/*more code here*/}
B.public int compareTo(Score other){/*more code here*/}
C.public int compare(Score s1,Score s2){/*more code here*/}
D.public int compare(Object o1,Object o2){/*more code here*/}

单项选择题Given: What is the result?（）

A.210
B.211
C.321
D.322
E.Compilation fails.
F.An exception is thrown at runtime.

单项选择题Click the Exhibit button. What is the result?（）

A.4321
B.0000
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 18.

多项选择题Given: Which two methods, inserted independently at line 17, correctly complete the Sales class?（）

A.double getSalesAmount() { return 1230.45; }
B.public double getSalesAmount() { return 1230.45; }
C.private double getSalesAmount() { return 1230.45; }
D.protected double getSalesAmount() { return 1230.45; }

单项选择题Given: What is the result?（）

A.Afoo Afoo
B.Afoo Bfoo
C.Bfoo Afoo
D.Bfoo Bfoo
E.Compilation fails.
F.An exception is thrown at runtime.