What reforms were implemented during the Tang and Song dynasties? 20 points!!! And brainiest A. Forming different departments and ministries in the government to separate power
B. Creating a group that would oversee the government and hold it accountable
C. Introducing civil service exams, which would find the most qualified people to work
D. All of these

Which statement best explains why a supreme court opinion is a seminal document? an opinion can become quite lengthy, which makes it a seminal document. supreme court documents are the only seminal documents in the united states. an opinion may create major changes in the laws or policies of the united states. generally speaking, a supreme court opinion reflects the feelings of all americans.