According to the PMBOK® Guide, specifically within the Plan Procurement Management process, the Procurement Management Plan is defined as a component of the Project Management Plan.

Integration: The Project Management Plan is the primary document used to manage a project. It is composed of several subsidiary plans and baselines. The Procurement Management Plan describes how a project team will acquire goods and services from outside the performing organization.

Content: It typically includes details such as the types of contracts to be used, risk management issues, whether independent estimates will be used as evaluation criteria, and how procurement will be coordinated with other project aspects (like scheduling and performance reporting).

Relationship to other plans: While procurement involves resources (Choice A) and costs (Choice C), it is not a " subsidiary " of those specific plans. Instead, all of these—the Resource Management Plan, Cost Management Plan, and Procurement Management Plan—are equal-level subsidiary components that integrate upward into the comprehensive Project Management Plan.

Analysis of other choices:

Choice A (Resource plan): This is a separate subsidiary plan that focuses on physical and team resources, not the legal and commercial process of external acquisition.

Choice C (Cost control plan): Cost control is a function within the Cost Management Plan; it is not the parent container for procurement.

Choice D (Expected monetary value plan): Expected Monetary Value (EMV) is a statistical technique used in Quantitative Risk Analysis, not a formal type of project plan.