Which of the following defines a group of projects that work together to achieve a common goal?

A product is a deliverable, artifact, or output produced by a project or organization, not a coordinated grouping of projects.

A portfolio is a broader collection of projects, programs, and operations grouped to facilitate strategic business objectives, but its components do not necessarily share a single common goal or work together directly.

A program is defined in project management standards as a group of related projects, subsidiary programs, and program activities managed in a coordinated way to obtain benefits and control not available from managing them individually. Programs align constituent projects toward a shared organizational objective, with a program manager overseeing interdependencies and governance across all included projects.

A project plan is a document that defines the scope, schedule, budget, and resources for managing a single project, not a grouping of multiple projects.