A digital service enables value through the use of digital products, so option A is correct. ITIL explains that digital services largely or fully rely on digital products, which are combinations of an organization's resources based on digital technology and designed to offer value. The service is what facilitates outcomes for consumers, while the product provides the underlying capabilities, technology, interfaces, data, and resources that make that possible. A digital product does not replace the need for services because service management is still required to support delivery, operation, support, and improvement. A digital service is not limited to internal IT systems, since it can serve internal or external consumers. It is also not independent of a digital product, because the product typically underpins the service relationship and service experience.