What is the main idea in the story ?
plz answer it is urgent

How does the author use structure to create tension in the excerpt

Arrange the events in chinese history in chronological order using the numbers 1-4. the ming dynasty falls to the qing. china experiences a 400-year period of peace known as the pax sinica during the han dynasty. a golden age of expansion and culture occurs during the tang dynasty. nationalists and communists fight a civil war for control of china.

It is true that prior to 1914 the united states often had been disturbed by events in other continents. we had even engaged in two wars with european nations and in a number of undeclared wars in the west indies, in the mediterranean and in the pacific for the maintenance of american rights and for the principles of peaceful commerce. but in no case had a serious threat been raised against our national safety or our continued independence. what is the theme of this excerpt? a. the responsibility for americans to avoid involvement in war.b. america’s history of international involvement.c. a new kind of threat to american security.d. america’s history as a peaceful nation.