Answer:
A. Helped to build the nation into an industrial giant.
Explanation:
Unskilled labor, both native-born, and from abroad (mainly immigrants from Europe), helped provide the needed labor force for the booming industry that developed after the Civil War, and that led the United States to become the most industrialized nation in the world by the start of the twentieth century.
However, the industrialization was geographically uneven: it mostly concentrated in the Northeast and the Great Lakes states, while the South continued to be rural, and stagnated economically.
I understand the war is the World War I. The assassination (of Austrian Crown Prince Franz Ferdinand) led to the Ultimatum (from Austria to the Kindom of Serbia) and the rejection of this ultimatum by Serbia led to Austria-Hungary declaring war (into which later other countries joined).
1 Nevada is the only state that includes "none of the above" as a ballot option. But if "none" finishes No. 1, the second-highest vote-getter wins. 2 A high point for third parties was 1912, when Teddy Roosevelt tried to win a third term in the White House because he was disgruntled with his successor, William Howard Taft. Roosevelt's Bull Moose Party beat Taft but lost to Woodrow Wilson. Roosevelt won 27 percent of the popular vote and got 88 electoral votes. 3 In 1967, the citizens of Picoaza, Ecuador, were treated to a series of advertisements with slogans such as "For Mayor: Honorable Pulvapies" and "Vote for any candidate, but if you want well-being and hygiene, vote for Pulvapies." The honorable Pulvapies was elected mayor by write-in votes, but could not take office. Why? Because Pulvapies was a foot powder.
Fallout Lore!!, just kidding. The US became very patriotic but was also constantly worried about the threat of total atomic annihilation. This caused many somewhat wealthy people to build actual fallout shelters in their backyards, especially during the fifties and sixties. Other than people almost constantly worrying about the cold war going hot, I can't think of much more going on at least in the US
It was more involved with Southern Europe then then the other churches. I'm learning this right now in world history.