D.
As you can see, the whole paragraph was talking about the family, loyalty of family... But suddenly it talked about "Chinese people are diligent workers". It does not fit the whole paragraph because it is severely off-topic.
Hope this can help you! Please put the branliest answer if you like it! If you have more questions please leave a comment or add me as a friend!
Answer:
It could be both, it would normally depend on the situation as you haven't given any, but according to your information, the phrase "they left for work" would be a dependent clause.
Explanation:
Subsequent is a time later or more recent than.
Action verb since you are doing something