B is correct answer because every newspaper, including the online are sharing content that is previously checked by the author's and they have to obey certain rules of journalism.
A is wrong because anyone can create a site and share content.
C is wrong because content shared on media isn't always reliable, as it can come from different sources.
D is wrong because information without an author is not valid.
The quality of being made up of exactly similar parts facing each other or around an axis. It helps art look precise and exactly the same on both sides
