I'm not 100% sure, but if your notes dont say anything else, then that would be my best guess. Define what the Cold War was and you should get the correct answer.
The answer is A. We can cross off C from the list because the Holocaust and D-day are known to have happened during the World Wars. America had a race for the first person to get to space with the Soviet Union, America’s enemy during the Cold War. We can eliminate B because the explosion of Maine happened in 1898. And lastly, we can cross off D because the Trench Warfare happened during World War I, not the Cold War.
New technologies that triggered the Industrial Revolution included the new steam engine (James Watt), construction of machines and improved textile technology. Improvement in the transportation system was also a trigger.
The purpose of federalism is for the development of state ,to achieve the balanced between states & to utilize the resources for fulfilling needs of peoples
