Final answer:
The publication especially useful in spreading revolutionary ideas was pamphlets, due to their affordability and ease of distribution. Newspapers also united colonists during the Revolutionary War by providing information about the British. Print media played a vital role in spreading knowledge and information from the invention of the printing press leading up to the Age of Enlightenment.
Step-by-step explanation:
The type of publication that was especially useful in spreading revolutionary ideas was pamphlets. Historically, pamphlets were a popular medium for disseminating contentious or revolutionary thoughts due to their cheap production costs and their ease of distribution. This is corroborated by the significant role that pamphlets played during critical moments such as the battle for ratification of the Constitution. The Framers of the Constitution highly valued the ability of individuals to express their beliefs through writing and distribution, given the widespread use of pamphlets and other forms of print media. Furthermore, during the Revolutionary War period, newspapers also played a critical part in uniting colonists and providing information about the British, as outlined in option 'b' of the given choices.
Early print media, which evolved significantly with the invention of the printing press, afforded a means to spread knowledge and information efficiently, a development many credit with leading to the Renaissance and the Age of Enlightenment. As the consumer revolution made printed materials more widely available, newspapers started to see an increase in their role as a medium for public discourse and revolutionary ideas. These early newspapers, however, also engaged in sensationalism and were subject to censorship that prohibited subjects that may lead to civil unrest.