ABC Telco wants to offers a self-service portal for their B2C customers so they can...

To offer a self-service portal for B2C customers to browse and order from the product catalog, Salesforce Industries' Digital Commerce solution is the most suitable (D). This solution is designed to enable customer-facing digital experiences, allowing customers to explore products, configure offerings, and place orders directly through an online portal.References:Salesforce Industries Digital Commerce documentation and best practices for self-service portals.