B. is the answer to the problem- let me know if it was right I'm pretty certain it is.
I would say the third option, as Fredrick Douglass wrote his as an autobiography, and Huckleberry Finn is an adventure-type story.
The answer is “...have thought myself a wise and fortunate man”
hope this helps, and hope you pass !
In this case it would be an adverb.
Hope this helps !!!
