Choice C is the best answer. The previous question asks what can be reasonably inferred about Precious Auntie's view of a hastily written first draft of a story, based on the artistic philosophy expressed in the fourth paragraph. The answer, that she would consider such a story to be essentially worthless in and of itself, is best supported by the sixth and seventh sentences of the fourth paragraph, which describe Precious Auntie's view of writing produced without effort: "You simply write what is swimming on the top of your brain. And the top is nothing but pond scum, dead leaves, and mosquito spawn."
Choices A, B, and D are incorrect because the cited lines don't support the answer to the previous question. Instead, they transition between the scene in the ink shop and the narrator's memories of Precious Auntie (choice A), summarize Precious Auntie’s assessment of ink quality (choice B), and describe the process of creating good writing through concerted effort (choice D).