Final answer:
The sentence that correctly uses the word 'reproach' is: "Waverly Jong's behavior as a Chinese daughter was beyond reproach," meaning her behavior could not be criticized.
Step-by-step explanation:
The sentence that uses reproach correctly is: "Waverly Jong's behavior as a Chinese daughter was beyond reproach." The word reproach can be used as both a noun and a verb. As a noun, it means the expression of disapproval or disappointment. In the provided sentence, it's used to denote that Waverly Jong's behavior was so impeccable that it could not be criticized; it was beyond the possibility of reproach. Alternatively, as a verb, reproach means to express to someone one's disapproval of or disappointment with their actions. The sentence from the referenced text, "Well, you mustn't reproach yourself, Mrs Hale," also uses reproach correctly, in this context as a verb, to mean that Mrs. Hale shouldn't feel disappointed in herself.