Which of the Following Is True of Online Research Communities

Which of the following is true of online research communities?

A) It refers to private online forums where respondents can post their questions.
B) It monitors online consumer conversations on social media sites such as social networks, blogs, and forums.
C) It involves the use of consumer groups, brought together privately in an online environment, to answer questions, and collaborate with researchers in real time.
D) It is an informal interview session in which six to ten people are brought together in a room with a moderator to discuss topics surrounding the market research problem.