Explanation:

Here’s the thing, marriages have rules about who can and cannot contract them. If someone who’s not legally authorized tries to conduct a marriage, it’s not just a technical hiccup—it’s a major problem. Let’s go through the options:

- Valid: Nope. If the right person doesn’t officiate, the marriage isn’t valid.

- Invalid : This hits the mark. An unauthorized person means the marriage doesn’t hold up legally.

- Void: Not quite the same as invalid. Void is like it never happened from the start, but this can depend on local laws.

- All of these: Can’t be, because “valid” definitely isn’t right.