Answer : Special type of legal treatment that had not been explored properly
Explanation : When Justice Lewis Powell stated that racial and ethnic distinctions require the most “exacting judicial examination,” he meant these qualities required a special type of legal treatment that had not been explored properly.
The U.S did not join the League of Nations following WWI. Even the the President of the United States at that time, Woodrow Wilson, was enthusiastic about the organization, they didn't officially join it. The reason why they didn't join it was because of isolationists in congress, in other words, people that didn't agree with what other people are interested in. Because of the war and all of the fatal deaths of Americans, people didn't want the U.S to be affiliated with Europe in any way.
<span> </span>CORE which was
founded by James Farmer began using sit-ins as a form of protest against
restaurants that were refusing to serve African Americans. This form of protest
had been popularized by union workers in the 1930s. CORE hoped to use to desegregate
restaurants that refused to serve blacks.