Read the passage. Paragraph 1: An environmental media course examines how podcasts explain water shortages to general audiences. Two assigned episodes focus on household use and emergency reserves. Paragraph 2: The course guide places both episode titles in the same sentence. [The seminar compares The Thirsty Block and Rain on Reserve.] A listening worksheet asks students to compare the hosts' evidence. Which choice gives the most appropriate punctuation for the marked sentence in this passage about the two water-use podcast episodes?