The correct answer is B. One of the world’s most destructive storms
In grammar, a sentence fragment refers to a group of words that go together but to do not express a complete thought and therefore are not classified as sentences but just as a fragment of them. In general terms, a complete sentence needs to have a subject or agent that performs or is related to the action and a predicate which contains a verb or main action and in some cases other words that explain the verb.
This means, if a fragment needs a predicate to be a complete sentence the fragment should only have the subject or agent of the sentence and lack the main action and in most cases a complement this is the case of the fragment "One of the world’s most destructive storms" that expresses a complete subject but does not have an action and a complement (predicate) and therefore could be completed by adding only a predicate such as "occurred in 2012" or "was Hurricane Katrina" that contains a verb and other words related to the verb or a predicate and that would create a complete thought or sentence.
The fragment that could become a complete sentence by adding only a predicate is "One of the world's most destructive storms".
Explanation: A predicate is the part of the sentence that includes a verb or verb phrase, which indicates what the subject is, is doing or is feeling, and, in some cases, modifiers. "One of the world's most destructive storms" could function as subject of a sentence; therefore, it could become a complete sentence by adding only a predicate, such as "was Hurricane Katrina". In contrast, "more than a week after the storm" and "being more universal" need a subject and a predicate and "was the deadliest storm of all time" needs only a subject.
It was the deadliest storm of all time
you can protest and boicot and have marches
a. was the...