Final answer:
The Department of Motor Vehicles (DMV) is responsible for making sure that drivers are able to safely operate motor vehicles by granting driver's licenses, administering tests, and enforcing traffic laws.
Step-by-step explanation:
The responsible party for ensuring that drivers are able to safely operate motor vehicles is the Department of Motor Vehicles (DMV). The DMV is responsible for granting driver's licenses and regulating driving laws. They administer tests to assess the knowledge and skills of drivers before granting them a license. The DMV also enforces traffic laws and monitors drivers' behavior on the road to ensure safe driving practices.