Answer:
B
Explanation:
Statement B best established Henry's trustworthiness because it shows that he's had experience as a politician and has knowledge about government.
The correct answer is argumentation, or argumentative writing.
It is a type of writing where the author is giving his or her arguments as to why they believe their position is the correct one. He or she is explaining why their ideas should be respected, even though they are controversial and unlike those of other people.