Which of the following events provides justification for authorizing a pre-existing relationship considered fraternization?

The correct choice, which indicates that none of the listed scenarios provide justification for authorizing a pre-existing relationship considered fraternization, is accurate because fraternization within military contexts is defined by the nature of the relationship and the potential for favoritism or a breach of military discipline.

Fraternization typically occurs when there is an inappropriate relationship between individuals of different ranks, which may undermine the authority structure essential in military organizations. Previous marriages, shared duty assignments, or family ties do not negate this potential for inappropriate relationships or the perception of favoritism.

Each of these situations can still lead to complications regarding command authority and the duty to maintain proper professional boundaries. Therefore, none of these scenarios justify a pre-existing relationship that could be classified as fraternization in the military context.