French immigration to the United States has been episodic, generally paralleling religious, political, and economic upheavals in France.
I'm pretty sure it is idiom
Answer:
I think it is A but I'm not sure. I hope this helps!
I also hope you feel better! Take deep breaths!
I think it was D. Basically the US sent South Vietnam troops because they feared Vietnam would become communist, which would spread to the rest of Asia. The US sent supply and materials to South Vietnam to help the spread. I don't know if the answer that best suits that is D, but that's what I would say.