Why did the Cold War result in an “arms race”?

Consider the demand for an inferior a good illustrated in the graph below suppose income decreases what effect would this have on the graph

What event ultimately started world war 2 and ended britain and frances attempt to prevent war?

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated