Objective language .. hope this helps
The right answer is option C.
The excerpt suggest the idea of a party circle where a joke about the hobbit has been told. Frodo's affection towards the hobbit is suddenly revealed to him when he realizes <em>"he loved the old hobbit dearly". </em>This phrase shows his<em> </em><em>loyal nature</em> towards the hobbit.
The element necessary to complete the sentence above is D) independent clause.
You already have a subject (I) and a predicate (save), so these two are not needed, nor is a prepositional phrase. But you need an independent clause, because this is a dependent clause which cannot stand on its own. For example:
If I save enough money, <em>I will buy a car. </em>
I'm assuming it is from the book Animal Farm? If so, it was Old Major the white boar.