The principle ofpragmatismin Disciplined Agile does not mean that the team will always do what the customer wants. Instead, it means that the team will make practical decisions based on the specific context, constraints, and overall business goals. The team may sometimes need to challenge or refine customer requirements to ensure that the solutions provided are feasible, valuable, and sustainable.
References:
* PMI's Disciplined Agile Senior Scrum Master (DASSM) curriculum materials.
* "Choose Your WoW! A Disciplined Agile Delivery Handbook for Optimizing Your Way of Working (WoW)", PMI.

When introducing new features to a large, existing product, the product team should employ the Minimum Business Increment (MBI) technique. In the Disciplined Agile (DA) framework, an MBI is a small, releasable component that delivers recognizable business value to a customer or user. Unlike a Minimum Viable Product (MVP), which is often used for new products or market exploration, an MBI is suitable for incrementally enhancing existing products by delivering value in manageable pieces. This approach allows teams to release new features more frequently and receive feedback more rapidly, helping them to prioritize future work based on actual customer and business needs. Continuous Integration (A) is a practice of merging code frequently to prevent integration issues, while Pull System (B) is related to Lean practices of managing work in progress.
MVP (D) is generally used for launching new products rather than adding to an existing one.