According to the PMBOK® Guide and the Agile Practice Guide, modern project management emphasizes that there is no " one size fits all " approach, especially for large and complex projects.

Hybrid and Multi-Modal Approaches (Choice A): To address the full delivery life cycle, a project manager must be versatile. Large projects often contain sub-components with different levels of certainty. For example, the hardware setup might follow a Plan-driven (Predictive) approach, while the software development follows an Adaptive (Agile) approach. Using a Hybrid model allows the project manager to select the most effective technique for each part of the project to ensure successful delivery.

Agile/Adaptive Only (Choice B): While Agile is powerful, it is not always the best fit for every component of a large project. Highly regulated industries or projects with fixed physical requirements (like construction) often still require predictive elements.

Changing the Role of the PM (Choice C): While the PM ' s style might shift (e.g., toward servant leadership in adaptive environments), the core responsibility of integration and delivery remains. The role doesn ' t fundamentally " change " its purpose; it adapts its methods.

Splitting Projects (Choice D): While decomposing large projects into smaller ones is a valid management strategy, it does not inherently address the life cycle requirements. A project manager must be able to handle the life cycle regardless of the project ' s size.

The PMBOK® Guide encourages Tailoring, which is the deliberate act of selecting the appropriate processes, inputs, tools, techniques, and life cycle phases to manage a project. For large projects, this almost always involves a blend of methodologies to balance control with flexibility.