A sales rep at Universal Containers was added to an opportunity team with Read/Write permissions.

Read/Write Opportunity Team access allows the team member to edit the Opportunity record, assuming the user also has the necessary object- and field-level permissions. Updating a normal Opportunity field such as Stage therefore falls within the access granted by the team membership. Ownership transfer is a separate privilege and is not automatically granted merely because a user can edit the record. Likewise, being a member of the Opportunity Team does not necessarily give the user authority to add or remove other team members; team administration is controlled by ownership and applicable administrative permissions. This distinction reflects Salesforce ' s layered security model: Opportunity Team membership supplies record access, while object permissions and ownership-related privileges govern what operations the user can perform. The owner always has the broadest control over the Opportunity and can manage collaboration more extensively than an ordinary team member. Study Guide reference: Access to Records - Opportunity Teams, Read/Write access, ownership, team administration, and collaborative sales security.