What Are the Four Most Common Business 2

What are the four most common Business 2.0 characteristics?

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