Answer:
The answer is indeed letter A) Dialect.
Step-by-step explanation:
In "The Return of a Private", author Hamlin Garland uses dialect to represent the way veterans from Wisconsin sounded. Check out the example below, taken from a line in the book:
"I'll git home in time f'r dinner, sure!"
A dialect is a regional variety of a language. It is distinguished from other regional varieties by characteristics of vocabulary, grammar, and pronunciation. In the example above, the author chooses to spell the words "get" and "for" as "git" and "f'r" to emphasize the way they are pronounced by the character. This distinguished pronunciation constitutes a dialect, since it is typical of a certain region of the United States.