Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to get a commercial drivers license (cdl ) [title] Check your state's eligibility requirements. [step] Each state has its own age, residency, and medical requirements for licensed commercial drivers. Generally, you must be at least 18 years old, or 21 years old if you plan to drive across state lines.

Ending1: [substeps] If you do not live in the state where you have a business, you cannot drive across state lines unless you have a business license. You can still qualify for a commercial drivers license under one of these regulations, but only once you are in the country. Ending2: Cdl is only offered to drivers ages 40 and older. [substeps] Every state has its own specific process for obtaining a cdl, but you may also choose to get a card or state-issued identification card for your license. Ending3: [substeps] One eligibility information label that identifies you as the registered driver for a driver's license is your federal identification number and your travel authorization number. Change this information on every type of business if you plan to use a commercial driver's license. Ending4: [substeps] Even if you never drive across state lines, you may need to be 21 if you work for a transportation or trucking company that is involved in interstate commerce. Some states require you to have been a resident of the state for several months before you are eligible to apply for a cdl.

Answer format: ending1/ending2/ending3/ending4