Please help Its not A OR D

How does the anonymous narrator’s first-person point of view in Jonathan Swift's “A Modest Proposal” affect its reading?
A.
It helps readers understand the social and political problems of the time.
B.
It indicates that the author is unbiased about the information provided.
C.
It leaves readers unsure about the credibility of the argument.
D.
It provides readers with a clear account of the political conditions of that time.