Many Americans wanted a new plan of government because the Articles of Confederation were far to "weak" to manage the nation successfully--as demonstrated by events like "Shays' Rebellion". the Articles were replaced with the "Constitution".
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.