* Building in a Developer Sandbox and testing changes in a test release environment is the best practice for creating a new process that uses most of the objects that were deployed. A Developer Sandbox is a type of sandbox that provides an isolated copy of the production environment for development purposes.
A test release environment is another type of sandbox that provides an isolated copy of the production environment for testing purposes before deploying changes to production.
* By building in a Developer Sandbox, the admin can create and modify configurations without affecting the production environment or other sandboxes. By testing changes in a test release environment, the admin can validate and verify the functionality and performance of the new process before deploying it to production.

1. The user's social network connection to the contact
2. The contact's social network privacy settings

These are the actions that can meet the requirement of restricting access to opportunities based on ownership and account association. Setting opportunity access on the role allows users to see opportunities owned by users below them in the role hierarchy, as well as opportunities associated with accounts they can access.
Setting organization-wide defaults for opportunities to Private means that users can only access opportunities they own, unless they are granted access by other means, such as sharing rules or manual sharing.