Answer:
the answer would be B, the man explains that way
C, Minerva disguises him as an old beggar. The idea is that he wants to go unrecognized when he returns home to his people. You can figure that he's an old beggar based on phrases like "a man of miseries" and "uncouth".
However, if you have trouble reading older texts, websites like Sparknotes and Shmoop are great for getting summaries.
I believe the linking verb is “will”. It’s linking the subject “the United States of America” and the predicate “be 300 years old!”