Final answer:
Franklin's establishment of the library system significantly contributed to society by increasing access to education, promoting literacy, and fostering a culture of learning, embodying the Enlightenment emphasis on knowledge and progress.
Step-by-step explanation:
Benjamin Franklin's establishment of the library system represented a significant contribution to society. In answering the question, how did Franklin contribute to society by establishing the library system, the correct answer is d) All of the above. The library system increased access to education which was pivotal during a time when books were expensive and literacy levels were low. It promoted literacy by making reading materials more widely available to the public, which was essential for spreading knowledge and fostering a well-informed populace. Furthermore, it fostered a culture of learning by creating communal spaces for the exchange of ideas and intellectual development. Franklin's initiatives reflected the Enlightenment principles that emphasized the importance of knowledge and education in societal progress.