How is version control enabled for a project?

A.
In Site Administration, by using the versioning toggle control

B.
In Site Administration, by checking Enable Version Control only at project creation time

C.
In Project Customization, by using the versioning toggle control

D.
In Site Administration, by using the Site Configuration parameters

Explanation:

http://h30499.www3.hp.com/t5/Quality-Center-Support-and-News/QC-Site-Configuration-Tab-inSite-Admin/td-p/4443810