The Owl and the cat are personified as a couple who are eloping with little means. They set sail in a pea-green boat with 5 pounds to their name and used one shilling of that (Around a quarter) to purchase a ring to consummate their marriage because they had tarried for too long.
The answer is B. Fredrick Douglass never describes his means of escape. He didn't want to disclose the information because he didn't want slaveholders to know how he or any other slave could have escaped.
