"The Bat Poet" is written in the first person point of view. Using this POV it allows inside knowledge and understanding into the theme of looking at something from another POV.
A seems to be the best answer but i could be wrong
Benefit: advantage:: gradual: slowly
The first two wrods are synonyms. To continue the sequence, you have to look for the closest meaning or synonym of the second word: gradual. Thus, the next word should be a synonym of gradual. I chose the word "slowly".