Which of the following is an example of dialect?

a. "i was passin' by," he began, by way of apology, "and i thought i'd just step in and see how things was gittin' on with tennessee thar—my pardner. it's a hot night. i disremember any sich weather before on the bar."
b. "is this all you have to say? " asked the judge impatiently."
c. "your exercise depends on your strength, my dear," said he, "and your food somewhat on your appetite; but air you can absorb all the time."
d. "bless her little heart! " said he with a big hug, "she shall be as sick as she ! but now let's improve the shining hours by going to sleep, and talk about it in the morning! "