Please choose the correct ending to complete the given sentence: Health: [header] How to prevent thrush [title] Brush and floss your teeth. [step] To keep your teeth healthy and resistant to infection, you should brush your teeth twice a day and floss once a day. Brushing when you get up in the morning and before you go to bed at night will keep your mouth healthy and infection free.

Ending1: Additionally, brushing before bed can lower the risk of the fungus causing thrush by stimulating bacteria growth. [substeps] By brushing your teeth at the start of the day and at night, you will help control the amount of bacteria that may be causing thrush in your mouth and mouthspace. Ending2: [substeps] Brushing and flossing reduces the risk of various infections in the mouth, including gingivitis. If your immune system is trying to fight off other infections, it is less likely to be able to fight off a thrush infection. Ending3: [substeps] Brush your teeth with a regular toothbrush every day. Use the brush as often as you have left the products in your mouth over the course of a few days. Ending4: If you feel like your mouth is not full of food after brushing, you should brush your teeth two or three times a day. Then, rinse your mouth with water to help make your mouth heal.

Answer format: ending1/ending2/ending3/ending4