Why should you think through a wiki's long-term purpose before you launch it?

A) Legal requirements state online material must be maintained for at least 10 years
B) Employee turnover will require the start of a new wiki
C) A wiki's purpose drives key matters such as writing guidelines,editorial oversight,and security
D) The long learning curve for new contributors
E) The upcoming obsolescence of wiki technology

Thinking through a wiki's long-term purpose is important because it drives key matters such as writing guidelines, editorial oversight, and security. By understanding the purpose, you can ensure that the wiki is set up with the appropriate security measures and that content is edited and managed correctly. It also helps in defining a clear goal for the wiki and aligning it with business objectives. Legal requirements only apply to specific types of content and may vary depending on the jurisdiction. Employee turnover and the learning curve for new contributors can be managed through proper training and documentation. Wiki technology is constantly evolving, but its obsolescence is not an imminent concern that requires long-term planning.