Please choose the correct ending to complete the given sentence: Health: [header] How to prevent tartar [title] Brush your teeth at least twice a day. [step] In order to remove plaque from your teeth, and in turn prevent tartar from developing, it's important to brush your teeth. Brushing twice a day is recommended to keep plaque and tartar at bay.

Ending1: Brush as much as twice a day depending on your current regimen. [substeps] Brush the outside surfaces of your teeth to break up plaque and tartar. Ending2: [substeps] Typically, you should brush your teeth in the morning when you get up and in the evening before you go to bed. However, pick a brushing schedule that works for you and stick to it. Ending3: [substeps] When brushing, use gentle circular motions that brush the gums and edges. Focus on areas that are clogged with tartar. Ending4: [substeps] Using a toothbrush or a regular brush, brush your teeth twice a day. Double your brushing schedule each time you brush your teeth to help eliminate plaque.

Answer format: ending1/ending2/ending3/ending4