The correct answer is D. BPR.
SCM (supply chain management) is the management of the flow of goods and services and information from suppliers to customers. EDI (electronic data interchange) is the computer-to-computer exchange of business documents in a standard format. WWW (World Wide Web) is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve billions of users worldwide. BPR (business process reengineering) is the fundamental rethinking and radical redesign of business processes to achieve dramatic improvements in critical performance measures, such as cost, quality, service, and speed.
BPR is not a feature of eCommerce because it is not a technology or a process that is specific to eCommerce. BPR can be applied to any business process, regardless of whether it is conducted online or offline.
SCM, EDI, and WWW are all technologies or processes that are specific to eCommerce. SCM is used to manage the flow of goods and services from suppliers to customers. EDI is used to exchange business documents electronically. WWW is the platform on which most eCommerce transactions take place.