The author uses dialect
a) to create new words for the novel.
b) to make his characters seem more realistic.
c) to show that the characters are uneducated.
eliminate
d) to make the passage more difficult to read.

b) To make his characters seem more realistic.

Explanation: The use of dialect by authors has the function of bring reality to the story it's being told, because it shows spelling, sound, grammar and pronunciation of a specific area and its inhabitants.

Dialect can also illustrate cultural, geographical and social background for the characters and the enviroment. Besides, produce discussion of cultural identity for those of whom the authors are talking about.

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