They have a further reach than just the area they are in. They can access social media, websites, and news outlets with the internet. It can save time and money as well. A wide range of audience is available via the internet. People in current times seem to be highly influenced by the internet. Those are just a few ideas that came to mind. If you have multiple choices, list them. You can also stick around a little bit and see what others have to say.
B. independent clause, dependent clause, other independent clause
The answer to your question is C) Our toothpaste is less expensive than the competitor, and it makes your teeth whiter too. Have a great day