The correct answer is D. Planning, executing, and completing a project
Step-by-step explanation:
Project management is a discipline that deals with the development of projects, especially in businesses. This discipline focuses on the different stages of developing a project that includes planning, executing, and completing a project, as well as other elements related to the development of projects such as budget, objectives, or time. Thus, project management can be best defined as "Planning, executing, and completing a project."