Answer:
I would say D
Explanation:
many people use pollution during the hours of these times as they are home from work and school
There are certain barriers to effective communication that every organization faces. These potential interruptions of the flow of information are referred to as "noise".
Communicative problems can be categorized into three groups: technical, semantic, or efficacy-related.
True its important to know every step as if you don't you can get injured.<span />
Actually to reduce cavities you need to brush you teeth at least 3 times a day.
But if you don't want cavities, plaque, or enamel on your teeth you should buy a very effective toothbrush and mouthwash to kep your teeth nice and clean.
You don't want Teeth with all kind of cavities in it, right? You want shiny and clean teeth. And to answer you question it all depends on what toothpaste you buy. Sensodyne Pronamel Gentle Whitening Toothpaste.
That toothpaste is designed for sensitive teeth and whitens your teeth. But it all depends on the person who buys the toothpaste and which one they like.
The type of toothpaste I use is Ultrabrite with advanced whitening. But as I said before, it is what the person likes...
I hope this answer helped you! :)