Which of the Following Statements About Manipulating Objects in a Set

Multiple Choice

Which of the following statements about manipulating objects in a set is correct?

A) A set iterator visits elements in the order in which they were added to the set.
B) You can remove an element at the position indicated by an iterator.
C) If you try to add an element that already exists, an exception will occur.
D) You can add an element at the position indicated by an iterator.