Answer: B) besides.
Explanation: an adverb is a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. A conjunctive adverb is an adverb or adverbial phrase that indicates a relation in meaning between two sequential independent clauses. In the given sentence the conjunctive adverb is "besides" and it connects the independent clauses "This apartment is quite roomy" and "the price is right."
