The correct answer is A. The loudest musical instruments
Explanation:
In grammar, a fragment refers to a part or section of a sentence, this means a fragment can contain either a subject, verb or object but is missing one key element to be complete or contain all of the elements but in an incomplete way. In the case of "The loudest musical instruments" this can be classified as a fragment because it is composed of a complete subject as it expresses the agent that performs the action, but no action or object is presented. Therefore, the fragment that is made up of a complete subject is "The loudest musical instruments". Also, other options present the verb and other words that complete the meaning but no subject.
