Matching. 1. the state testing of potential attorneys to see if they qualify for legal practice public works 2. official and legal authorization for a specific ownership or practice state bar exam 3. the creation and maintenance of state fire and police departments, hospitals and other citizen needs licensing 4. the creation and maintenance of state roads, dams, building and other similar projects public safety

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.