Answer:
D). Milestones are developed during risk planning.
Step-by-step explanation:
Milestones are demonstrated as the tools through which mark particular points or stops in a particular project. These points help in marking the significant phases in the development of a project that keeps the execution of the project efficient and successful.
As per the given description, option D fails to describe appropriate use of milestones associated to cost control as it asserts a wrong claim('Milestones are developed during risk planning') rather milestones are one of the crucial elements of scheduling or planning the project with chief emphasis on marking the advanced/progressive phases of the project. Thus, option D is the correct answer.