Final answer:
The correct option is D) A public relations firm.
The appropriate specialized service for preparing news releases, promoting, and managing a charity concert for an orphanage would be a public relations firm.
Step-by-step explanation:
If a client wants to organize a concert to raise funds for 'The Little Ones,' an orphanage in Houston, the specialized service responsible for preparing news releases and promoting and managing the concert would be D) A public relations firm. A public relations firm specializes in crafting and disseminating information to the public to promote events, create positive publicity, and manage communication with the audience. They are proficient in dealing with the media, organizing promotional events, and handling crises if they arise. For an event such as a charity concert, a public relations firm will also be adept at incorporating messaging that highlights the cause and encourages attendance and donations.
Among the other options, a digital agency mainly focuses on online marketing strategies, a marketing research firm specializes in analyzing market trends and consumer preferences, an interactive agency creates online engagement strategies, and a sales promotion agency primarily deals with promotional activities and incentives to increase sales. Thus, the best fit for the described task is a public relations firm due to their expertise in event promotion and managing community relations.