A. because it is just right
A complete predicate must start with a verb. 'The first day of the semester' is a complete subject. It is WHAT the sentence would be about. "With the new books and schedules in hand" is a prepositional phrase, which simply adds information to a sentence. "Because of the slamming of the lockers and the shouts of the students" is an introductory clause. "Could not be heard above the voices in the hallway" is the only complete predicate.
A group of words that can function as a complete sentence, consisting of a subject and verb and expressing a complete thought.
An independent clause is a phrase that functions as a complete sentence by itself. There is no need to add any other clauses with it.
<em>"I went to the store"</em> is an example of an independent clause.
The sentence "Having read your letter, my German shepherd will stay inside after dark" <span>contains a dangling modifier.
</span>A dangling modifier is a word or phrase that modifies a word not clearly stated in the sentence.<span> Because of the separation, sentences with this error often sound awkward, ridiculous, or confusing.</span>