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.
An antagonist is the character who basically causes the problems in the story. They do not have to be a bad person, they just simply have to create the conflict for the protagonist, whether on purpose or accidentally.
Answer: Hyperbole
A hyperbole is an exaggeration that is not meant to be taken literally. It is usually used to make a persuasive point or to add emphasis. In this case, "opening a door to eternal tyranny" is an example of an exaggeration of this type. While it is likely that tyranny will not be eternal (the country itself will not be eternal), its purpose is to emphasize the risk of keeping the seat of governent vacant.