Answer: D. Communities in the real world are more appropriate.
Step-by-step explanation:
An observation about this answer must be made. I don't think that communities in the real world are extraordinary and have a perfect behaviour, but it is real that it isn't so easy to follow a whole free will action plan as it is doing so in the online world.
In real life, our faces and names are known in our local area, we have a reputation, a public way of being. On the other hand, when we are online, no one knows who we are, we can completely change our image. Say what we want, act how we want. Of course there are regulations for online communities as well in order to have a safe environment as possible, but for some reason, people find it easier to break these norms rather than the real life ones.