SCJP Questions

You need to store elements in a collection that guarantees that no duplicates are stored and all elements
can be accessed in natural order. Which interface provides that capability?
A. Java.util.Map.
B. Java.util.Set.
C. Java.util.List.
D. Java.util.StoredSet.
E. Java.util.StoredMap.
F. Java.util.Collection.
Answer: D