Answer:
b. LinkedHashSet
Explanation:
A LinkedHashSet is an ordered version of HashSet that maintains a doubly-linked List across all elements. When the iteration order is needed to be maintained this class is used. LinkedHashSet maintains a linked list of the entries in the set, in the order in which they were inserted.
The advantage of using email to complain about a service or product is
that you are likely to get a faster response because this is the most
common way in which complaints are tackled, and it also means you have a
written record of the conversation between yourself and the company.
D I would think……… good luck
Domain Keys Identified Mail is the answer:)
