Answer:
D) identify the type of conflict
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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.
To begin with letter 3, It could be said that the main theme is determination because Walton feels confident about the voyage and he is ´determined' to go on with it despite the weather conditions.
As regards letter 4, we might say that the theme may be trust and friendship because Frankenstein and Walton met and he is will to tell him the his story. So this letter might be seen as the beginning of their friendship.