I don’t understand this question
A reliable source is a document!
I'm not 1000% confident in this answer but I believe it's B) to inform readers about the tactics Sparta and Rome used to hold cities and their effectiveness
B: the subject's diary
all other sources are not primary, and therefore trash
A simile is a kind of figurative language used to compare two objects or ideas using the terms "like" or "as". It is used to exaggerate the meaning or to bring a certain point across about the object. In your example, "when I began reading a book it was like a bowl of letter soup, " it compares when you first started reading to a bowl of letter soup which emphasizes how first learning to read is a bit confusing since all you seem to see is a bunch of jumbled letters.
