QUESTION 15 If your program noods to make a lot of changes to one or more string, you might consider using objects of this class: O Character O String O StringBuilder Al of these QUESTION 16 What is the value of scores (21 (3] in the following array? int 11 (1 scores (88, 80, 79, 921 75, 84, 93, 80), O 84 O 93 O 95 O 94 (98, 95, 92, 94,191, 84, 6B, 96) QUESTION 17 Look at the following declaration: enum Tree OAK, MAPLE, PINE What is the fully-qualified name of the PINE enum constant? enum. PINE O Tree (PINE) PINE.Tree O Tree.PINE