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.
The correct answer is C. persuasive essay.
Different types of essay forms are used for different reasons. The persuasive essay is used to convince another individual, the reader, to accept your point of view and behave or think in the manner which you presented. This is why this type of essay has to be backed by evidence and logic, or emotional appeal and common sense.