project management is best defined as: a. a sequence of tasks with a beginning and an end. b. the most important task in the performance of the managerial functions of planning, organizing, leading, and controlling. c. project conceptualization, project planning, project execution, and project termination. d. a carefully planned and organized activity, designed to accomplish a specific objective that is usually a one-time effort with a beginning and an end, involving conceptualization, planning, execution, and termination phases.