Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to brush baby teeth [title] Begin checking for baby teeth at birth. [step] Though rare, some babies have come into the world with teeth already present. Check for the presence of teeth by gently sticking a clean finger into the baby's mouth and feeling around the gums.

Ending1: If there is no visible latching or marks, then your baby teeth will be present. [substeps] Newborn babies older than six months old should be tested every 4-6 months on their teeth. Ending2: If you feel any change or sensitivity to your finger, you probably want to brush your baby teeth. [substeps] Think about how often you touch your baby's teeth. Ending3: Feel for tiny ridges or a mild inflammation along the gum line. [title] Continue to check for tooth eruptions on a regular basis. Ending4: If you feel that your finger comes out clean, you are sure your baby teeth have come into the world. [substeps] If it's not possible to find baby teeth at birth, your baby teeth may not need regular dental check-ups.

Answer format: ending1/ending2/ending3/ending4