單項選擇題

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.

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