Answer:
A. When its members communicate informally online, then under this circumstance, a group is considered as an e-community.
Step-by-step explanation:
E-Community is also known as online community. This is a kind of virtual community whose members communicate virtually via Internet. It could be also called “family of online friends”.
They discuss and collaborate online. People may also join these online communities through video games or blogs. People of different cultures across the world interact with each other online. There may be people joining these communities and contributing by expressing their opinions and beliefs. There may be others who do not interact and are called lurkers.