Assuming the question asks which of the following is found in the sentence, neither A. a dependent clause or C. a subordinating conjunction exist in the sentence, so the only possible answer is B. an independent clause.
"The harsh wind scoured the scant remaining leaves from the trees" ⇒ This is an independent clause because it represents a complete thought.
"a desolate landscape remained in its wake" ⇒ This is also an independent clause.
", and" ⇒ This is a coordinating conjunction, connecting two independent clauses.
