When Your Class Implements a Comparator Object, You Must Implement

Multiple Choice

When your class implements a comparator object, you must implement the compare method. What must be true about the return value from this method when comparing two objects, a and b with a call to a.compare(b) ?

A) It must return 1 if a comes before b, 0 if they are the same, and -1 if a comes after b.
B) It must return -1 if a comes before b, 0 if they are the same, and 1 if a comes after b.
C) It must return a positive value if a comes before b, 0 if they are the same, and a negative value if a comes after b.
D) It must return a negative value if a comes before b, 0 if they are the same, and a positive value if a comes after b.