please answer the following question

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If we add a node to an empty singly-linked list, which is true about the state of the list where the head and tail of the list have been referred respectively by two reference variables? The new node is the tail of the list, the head node is null. The new node is the head of the list, the tail node is null. The new node is the head and tail of the list. The new node is the head of the list, no tail exists. Imagine you need to keep a list of donors for a fundraising event, so that you can send thank-you cards. The 'Donor' class has name and address. You know that you will have at most 400 donors and you really don't care what order they are stored in. You aren't going to add more donors later, and the only thing you are going to do is eventually iterate the list and print out address labels. What type of list should you use? Doubly-Linked, Sorted List Singly-Linked List Arraylist Sorted List