What Are the Four Most Common Business 2

What are the four most common Business 2.0 characteristics?

A) Content sharing, user-contributed content, collaboration competition elimination, web browser organization
B) Content sharing, open source through specialty-contributed content only, collaboration inside the community, specialized collaboration
C) Content sharing through open source, user-contributed content, collaboration inside the organization, collaboration outside the organization
D) Consumer sharing through open systems, company-contributed content, collaboration inside the organization, collaboration throughout the organization