An introductory device is a strategy used to begin a speech or an essay. It is meant to engage your audience. A rhetorical question is a good mechanism to do this because, whether the question is meant to be answered or not, it helps the audience focus on your speech by making it more personal and forcing them to think about the answer.
The following describes how the introduction of the printing press affected society:
B. People had the ability to print and share their ideas.
Mass amounts of information were able to be shared quickly on a wider scale, allowing people to print, distribute, and share ideas and accurate information.