D. The end of the cold war
The correct answer you are looking for should be answer D. They adopted Hanry Fords manufacturing techniques
Answer:
Nationalism and imperialism encouraged each European nation to pursue its own interests and compete for power. ... The alliance system pulled one nation after another into the conflict.
Explanation:
The bloodiest battle of the war (Gettysburg) and the bloodiest single day of the war (Antietam) were both fought in this theater. The capitals of Washington, D.C., andRichmond<span> were both attacked or besieged.</span>