I would say the third option, as Fredrick Douglass wrote his as an autobiography, and Huckleberry Finn is an adventure-type story.
Answer:
Explanation:
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20 adverb modifying go.
21 Reading a book is a gerund phrase subject of the linking verb is. [It's the only phrase in the sentence].
22 Of the United States is an adjective phrase modifying president.
23 To get. Infinitive It's acting like a noun
24 Participial phrase modifying dog