The answer is:
They will serve in the military when required.
They will support and defend the US Constitution.
They will show allegiance to the nation's laws
Basically, all naturalized US citizens are required to upheld the same obligations like the citizens that born in united states. Voting in election and volunteering in political campaigns are considered to be the right/freedom of the citizens, not the obligation. You would not face legal punishments if you choose to avoid your rights, but you could face it if you avoid your obligations.
The answer is letter a, the entrepreneur comes us with a more efficient way to make products because this is a way of improving profitability on his or her business because having an efficient way to make products will help him or her to make his or her products to sell and in the same time, it is timely and he or she has a strategy that will help him or her to save money and make a profit out of it.
Answer:
Major industries fled the city for other regions.
Explanation: