Choose the sentence that uses the method indicated. (Both sentences are correct.) Main clause and subordinate clause joined by conjunctive adverb a. Since Jeremy is a natural hoarder, he never throws anything out, no matter how useless it is. b. His room is full of papers, souvenirs of hockey games, how-to manuals for everything, and old toys; therefore, there isn't room for his desk, and he must sit on the floor to study. Choose the sentence that uses the method indicated. (Both sentences are correct.) Main clause and subordinate clause joined by conjunctive adverb a. Since Jeremy is a natural hoarder, he never throws anything out, no matter how useless it is. b. His room is full of papers, souvenirs of hockey games, how-to manuals for everything, and old toys; therefore, there isn't room for his desk, and he must sit on the floor to study.