Answer:
He was the ruling monarch of Great Britain during the time of the Colonies and the American Revolution. He was essentially the reason that the Colonists revolted.
Explanation:
The correct answer to this open question is the following.
Although the question is incomplete because it does not provide a specific reference about the author of the letter or any other reference, we can comment on the following.
A primary source is the piece of information that was written by a character or an individual that lived in the moment of the event, was part of the event, or witnessed the event. This individual could have written a letter, or a document -including a book. Or he/she took a photograph. Or was part of an interview. The secondary source includes information from a third person who was not part of the time or event but has found information through other resources. It is the case of an encyclopedia or researchers/historian books.
The enlightment basic ideology is freedom. Freedom to choose your own opinion, freedom to do what you desire, freedom to pursue something that you want, etc.
The independence itself is the embodiment of enlightnment because independence is the act of break free from a restrictive rule or establishment that previously dictate what you should and shouldn't do.
D. Increased industrial development