Answer:
There is a mistake in the sentence, and the proper way to correct it would be:
D) The Teutons believed that before there were any gods or any world there was a great empty space where the world now is.
Step-by-step explanation:
The sentence is about a belief the Teutons used to have: they believed there was a great empty space where the world is now. It does not make sense to use the conjunction "unless", which conveys the idea of a requirement or condition for something to happen, if it has already happened. Therefore, it makes sense to replace "unless" with "before", since the sentence is about this empty space which the Teutons believed existed before there was a world as we know it. In fact, that space even had a name: Ginnungagap.