The order in which the community manager should perform activation steps is A. To activate a site in Experience Cloud, you need to complete several steps, such as adding profiles and permission sets, enabling contacts as community users, setting welcome emails, and setting the site to active. The order of these steps is important, because some steps depend on others. For example, you need to add profiles and permission sets before you can enable contacts as community users, and you need to set welcome emails before you can set the site to active.