Final answer:
Dr. Franklin, also known as Benjamin Franklin, lost his position as Postmaster(option b). This role was highly significant in early U.S. history, as it involved managing the nation's communication systems.
Step-by-step explanation:
The question concerns a historical figure, Dr. Franklin, more commonly known as Benjamin Franklin. Franklin was never a king or a president, but he did indeed serve as a postmaster.
According to the provided LibreTexts excerpt, Montgomery Blair was appointed as the Postmaster General under President Lincoln's administration, illustrating the importance and recognition of the role of Postmaster General in American history.
Thus, in the context of American historical figures and their roles, Dr. Franklin lost his position as Postmaster, an essential communications role in the early United States. The position of Postmaster has historically been significant, as those who held the office were instrumental in organizing and managing the flow of information, which was critical for the functioning of government as well as the general population.