Answer:
(C) Chang was able to piece together much about the Chinese workers' daily lives, poetry and folk songs.
Step-by-step explanation:
Hello. You did not inform the article to which this question refers, however, through the context of the sentence presented in the question and the answer options, we can consider that the answer presented above is the correct answer.
This is because, it would only be possible for Chang to get pieces about the life, poetry and songs of Chinese workers, if these elements had been saved and preserved by someone. In this case, we can consider that the descendants of these workers were responsible for keeping these elements and ensuring that they were not forgotten or completely erased from history.