Select an Appropriate Declaration to Complete the Following Code Segment

Select an appropriate declaration to complete the following code segment, which is designed to read strings from standard input and display them in increasing alphabetical order, excluding any duplicates. _________________________________________
Scanner input = new Scanner(System.in) ;
While (input.hasNext() )
{
Words.add(input.next() ) ;
}
System.out.print(words) ;

A) LinkedList<String> words = new LinkedList<String>() ;
B) Set<String> words = new Set<String>() ;
C) Set<String> words = new HashSet<String>() ;
D) Set<String> words = new TreeSet<String>() ;