What are the two best reasons for a writer to provide anecdotes when making a claim in an argumentative text? Anecdotes are used as a way to support an argument with data.
Anecdotes can be used as evidence to support an argument.
Anecdotes can never be rebutted by a person making a counterargument.
Anecdotes are more convincing than allusions in an argument.
Anecdotes can provide emotion and make the argument more compelling

I believe the two best reasons here are:

“Anecdotes are used as a way to support and argument with data.”

And

“Anecdotes can provide emotion and make the argument more compelling.”

jenkins wanted the narrator to write a ghost story for his magazine. he wanted the narrator to give the readers a story based on the supernatural. he wanted him to give the readers real 'horror' stories and not the type of live ghosts which he had presented in his earlier stories.