The prepositional phrase for this sentence is "go until Friday." The word "go" is a preposition. Think of it as a squirrel and a log. To find a preposition, say "The squirrel (went) [insert preposition] the log." If it makes sense, it is a preposition. Then just find the phrase to go along with it!
B. To allow the reader to understand Odysseus’ full experience
Mortified means you are highly embarressed. People are embarressed because they fail or they are ashamed