Answer: B. Letty doesn't make a lot of money waitressing.
Explanation: In the given excerpt, we can see the description of Letty's daily routine, where she balances two jobs with the school. From the text, the best inference that we can make, is that Letty doesn't make a lot of money waitressing, because she is in the morning shift, and she says that the early customers don't tip very well, also, she has a second job at a factory, which means she doesn't make a lot of money as a waitress.
The answer would be D, remember that hyphens are used to link two phrases to turn them into one conjoined
Mark Twain spent his days running around with a group of other local boys engaging in hijinks, tomfoolery, and getting in all sorts of mischief. Read more: bit.ly/2gxdQYE