ABC Telecom has a requirement to allow their customers to upgrade or downgrade plans from...

The "Change of Plan" feature in Salesforce Communications Cloud (often accessed via Digital Commerce APIs or the Cart) is designed to handle the complex logic of modifying an existing customer's service portfolio. The three key offerings/capabilities are:

Supported by Digital Commerce APIs (A): Salesforce provides specific Digital Commerce (DC) APIs (e.g., getChangeOfPlanOffers or generateChangeOfPlan) that allow this complex logic to be exposed on self-service portals. This enables customers to view eligible upgrade/downgrade paths and execute the change without agent assistance, calculating pro-rated costs in real-time.

Moving to/out from the bundled offer (B): The feature is sophisticated enough to handle structural changes in the product hierarchy. It can take a standalone asset and move it into a bundle (e.g., moving a standalone internet line into a "Triple Play" bundle) or unbundle a service, maintaining the integrity of the commercial and technical data throughout the transition.

Service Continuity (E): A critical requirement in Telecom is that the "Change of Plan" (Commercial Change) does not accidentally disconnect the underlying technical service (Technical Change) unless intended. The Change of Plan feature ensures Service Continuity by preserving the link to the existing Technical Products (RFS) and Assets, ensuring that a customer upgrading their billing plan doesn't suffer a service outage during the provisioning process.

Why C and D are incorrect:

D (Customers can choose from all plans...): This is incorrect. The Change of Plan feature specifically uses Eligibility and Context Rules to filter the catalog. A customer on a Fiber plan cannot "choose" a legacy Copper plan if rules forbid it. They only see eligible target paths, not all plans.

C (History...): While Salesforce tracks field history and asset history, "Traceability" is a platform characteristic, whereas Service Continuity and Bundle manipulation are specific functional offerings of the Change of Plan logic engine.