Answer:
A. besides
Step-by-step explanation:
A conjunctive adverb is an adverb which joins two clauses. It can be used in the sentence to draw contrast or cause and effect relationships. They behave much like coordination conjunction. They join two independent clauses in a sentence. In the above sentence, the word 'besides' is the conjunctive adverb. The two independent clauses which are 'this apartment is quite roomy' and 'the price is right' are joined together by the conjunctive adverb 'besides.'