Answer:
A.Twain's use of idioms
Explanation:
Mark Twain is one of the greatest authors that write American Realism, this means that he protrays reality as it is, and you can see it in Life on the Mississippi by reading the colourfull language that they use, he puts every word and phrase that the people there are using, and tries to reflect society and characters just as they speak. You can read and feel the different tones and words that the characters use and feel like if you were there with them.
