For a new implementation of SAP S/4HANA Cloud Private Edition, following the SAP Activate methodology is standard. The process begins with the Discover phase, where a Detailed Digital Discovery Assessment (C) is required. This tool is crucial for evaluating business requirements and scoping the solution against SAP Best Practices.

Following this, in the Prepare phase, the project team is established. A lead configuration expert (A) is a critical role. This individual is responsible for overseeing the activation of the selected SAP Best Practices content and guiding the fit-to-standard workshops, which form the foundation of a new implementation (greenfield) project.

B. A lead conversion expert is a role specific to system conversion (brownfield) projects, not new (greenfield) implementations.

D. The Software Update Manager (SUM) tool is used for system conversions and upgrades, not for the initial installation of a new system.

1. SAP Activate Roadmap Viewer: SAP Activate Methodology for SAP S/4HANA Cloud, private edition.

For option C: In the Discover Phase, the key deliverable is the "Digital Discovery Assessment". The description states, "The Digital Discovery Assessment is a self-service tool to help you assess your requirements, scope the solution, and estimate the effort for your SAP S/4HANA Cloud, private edition project."

For option A: In the Prepare Phase, the task "Self-Enablement of Project Team" and subsequent phases (Explore, Realize) necessitate the role of a configuration expert to manage the solution build, starting with Best Practices activation. This role is fundamental to the fit-to-standard approach.

2. SAP Help Portal: Conversion of SAP Systems to SAP S/4HANA Using Software Update Manager 2.0.

For options B and D: This official guide details the process for system conversions (brownfield), explicitly naming the Software Update Manager (SUM) as the required tool and outlining tasks that would be performed by a conversion expert. This confirms these elements are specific to conversions, not new implementations.