Answer: C. an exchange of dialogue between the speaker and the visitors.
Explanation:
In the second paragraph of this essay by Zora Hurston, we learn how the residents of Zora's Black American town of Eaton, Florida, treated Southern whites who passed through with indifference but treated the Northerners with awe and excitement.
A development to this paragraph would be an exchange between the speaker and the visitors so that we may better understand the awe and excitement that the Northern whites were greeted with.
The sentence that would best fit at the beginning of a first paragraph and would also make the best topic sentence is: Mammoth hot springs is a popular attraction because the springs are unique. The correct answer would be option D. This sentence is the correct answer because it is the only sentence that introduces the topic.
The word harbingers as it is used in this excerpt is a person or thing that announces or signals the approach of another.
