It seems that you have missed the necessary options for us to answer this question, but I hope this answer helps. Anyway, during the first years of World War II, the U.S. government changed its foreign policy and in September 1939, President Roosevelt declared his commitment to U.S. neutrality. But by September 1940, he supported "all aid (to Allies) short of war", and the one that caused this change is this: <span>The Axis seemed to be winning the war. Hope this helps.</span>
I'm not sure...
But,
It upheld the constitutionality of racial segregation laws for public facilities as long as the segregated facilities were equal in quality – a doctrine that came to be known as "separate but equal".
I guess
B) The Supremacy Clause states that no judge can contradict federal law.
This means that the The US Constitution and the laws made in accordance with it by the federal government are the supreme law of the land, and cannot by contradicted. The only exception is the power of judicial review, held by the Supreme Court, to strike down laws declared unconstitutional. This actually is not a real exception though, because it indicates that the law did not comply with the Constitution in the first place.
<span>Karl Marx predicted that the proletariat would overthrow the Bourgeoisie. The communism's father created a theory that states that with the contradictions of the class fight, one day the proletariat would overthrow, literally, the force and the power of the bourgeoisie class, that holds the power and maintain the exploration setting.</span>
Made killing at a distance more effiecient
Also it made arming, cothing and feeding soldiers cheaper than training them. So now young boys were recruited, armed, hopelessly undertrained and thrown into trench to die, hopefuly killing some opposing soldiers before that. It made soldiers a resource to be expended.