Read the following excerpt from Mark Twain's short story "The Celebrated Jumping Frog of Calavares County," and answer the question that follows. Smiley ketched a frog one day, and took him home, and said he cal'klated to edercate him; and so he never done nothing for three months but set in his back yard and learn that frog to jump. And you bet you he did learn him too. He'd give him a little punch behind, and the next minute you'd see that frog whirling in the air like a doughnut--see him turn one summerset, or maybe a couple, if he got a good start, and come down flat-footed and all right, like a cat.

What tone is created by Twain's use of dialect?
A. Humor
B. Suspense
C. Happiness
D. Conflict