The correct answer is C.
In order to understand an informational text we have to make sure we truly comprehend it.
The best way to make sure we know what the text is about is discovering the author's purpose. In order to have a better understanding we can ask ourselves questions like: "what is the author's opinion on this subject?"
PRO gress,,PRE conceived, PRE cede, POST mortem(?), POST script, PRE amble ... perhaps ?
Debut is the answer because the definition of debut means to introduce first or appear first.
Answer: for 2 it ended slavery i think and for 3 i dont know
Explanation: