Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to advertise on buses [title] Outline your demands for your advertising campaign. [step] This should include the product or service you want to advertise, your target audience, your budget, and preferred launch date and running period of the campaign. [title] Hire an advertising company that creates compelling ad campaigns for buses.

Ending1: [step] Do not hire someone that sets you up as the one that has the most money. [title] Use the national boards about referrals. Ending2: [substeps] The best way to find a qualified advertising agency is to make a note of a current ad campaign on buses and call the bus company or the company whose product is being advertised to find out which agency designed the campaign. You can also do an online search for advertising companies that design bus advertising campaigns. Ending3: [title] Inform your flyers of the consequences of diesel vehicles expelling diesel drivers and manufacturing diesel. [title] Deter drivers from vandalizing buses by introducing traffic to different buildings in your area. Ending4: [step] At the beginning of your campaign, some efforts may indicate a widespread demand for bus or truck headlights. Include as much wiggle room as possible while providing more information.

Answer format: ending1/ending2/ending3/ending4