It's good to make a note of an example when you read the passage over the first time. In the second paragraph, there was a Chinese worker -- Pico worker example to discuss establishing globalized perspective on working condition and international ties through "recent immigrants." (25-34)
Let's get into the answer choices.
A) Out of scope. Globalizing perspective on working condition is discussed but not the contrasting with U.S.
B) Considering something similar has been presented as an example, it's far-fetched to say that it's "unique."
C) Regarding “recent working-class immigrants.” This is it, as discussed above. Correct.
D) Too general. And it would be a wrong subject. This was about Pico workers and recent-immigrants providing the international ties to the Korean American community. Korean American community is not the subject to be analogized.
E) This example was not to present "problem" but a discovery of a new role. Also, there might be similarities but no contrasting.