Why are netiquette and online privacy important concerns for any online user?

A. Netiquette and online privacy create a climate of respect and safety online.
B. Netiquette is a way to make friends online. Once you make online friends, you don’t have to worry about privacy.
C. Netiquette is a search engine, like Google: if you have Netiquette then you automatically download online privacy.
D. Netiquette and online privacy used to be major concerns for online users, but in recent years, it’s not important.