The correct answer is C. before the conjunction.
If there is a conjunction between two independent clauses, then the comma will be placed in front of it. For example: <em>We had a lot of fun at the beach, but I feel tired now. </em>
As you can see, the comma is located in front of the conjunction <em>but. </em>Simply placing a comma between the sentences (without a conjunction) creates a run-on sentence, and that is grammatically incorrect.
As the first Roman emperor (though he never claimed the title for himself), Augustus led Rome's transformation from republic to empire during the tumultuous years following the assassination of his great-uncle and adoptive father Julius Caesar
This isn't a great story, to be quite honest. The story focuses less on the ways man used to start fires and more on the ways that nature started fires independently of humans.
That being said, it would seem as though the author is trying to express the fragility of fire early on, and it does seem as though he/she is saying that early on, humans just found a small amount of fire from a really dangerous origin to use as a kindling.
For sure, your answer should come from the second paragraph, which is the paragraph describing early kindling methods.
