Stay safe online make sure not to give any personal info. Don’t talk to any strangers definitely if it can be prevented. If you feel uncomfortable and you feel like you are being used under any circumstances you need to tell a adult.
I think the correct answer is A
Your mouth, nose, throat, sinuses and lungs are lined with mucus membranes. These membranes contain mucus glands that produce - surprise - mucus. Mucus-producing membranes line specific passages in your body, like the respiratory and digestive tracts, for protection and support.
I’m pretty sure they included more than one independent variable.
