According to the PMBOK® Guide, the Develop Schedule process is the process of analyzing activity sequences, durations, resource requirements, and schedule constraints to create a project schedule model for execution, monitoring, and controlling.

Schedule Network Analysis and Critical Path Method (Choice A): These are core Tools and Techniques explicitly listed for the Develop Schedule process.

Schedule Network Analysis is the overarching technique that employs various analytical methods (like CPM) to generate the project schedule model.

Critical Path Method (CPM) is used to estimate the minimum project duration and determine the amount of scheduling flexibility (float) on the logical network paths within the schedule model.

Activity List and Expert Judgment (Choice B): While Expert Judgment is a technique used here, the Activity List is an Input (from the Define Activities process), not a technique used to develop the schedule.

Milestone List and Risk Register (Choice C): These are Inputs to the process. The Milestone List identifies specific points or events, and the Risk Register provides information on risks that could impact the schedule duration or logic.

Basis of Estimates and Rolling Wave Planning (Choice D): Basis of Estimates is an Input that provides the supporting detail for duration estimates. Rolling Wave Planning is a technique used in Define Activities, where work to be accomplished in the near term is planned in detail, while work in the future is planned at a higher level.

By utilizing Schedule Network Analysis and the Critical Path Method, the project manager can identify the sequence of activities that has the least amount of scheduling flexibility and ensure that the project is completed in the shortest time possible.