Which of the following is a good piece of advice for wiki collaboration?

a. Because so many writers can be involved in a wiki, managerial control of content and process is essential.

b. Personal responsibility is paramount with wikis, so all contributors must safeguard their contributions against unwelcome editing.

c. Conventional web security measures such as access control should never be used on wikis because they inhibit free collaboration.

d. Wiki writers need to let go of traditional expectations of authorship, including individual recognition and control.