A project manager is trying to explain to a stakeholder why projects are progressively elaborated upon. Which of the following is the BEST explanation?

A. In the beginning, projects entail a degree of uncertainty that needs to be specified.
B. In the beginning, projects have start and finish dates that require elaboration.
C. In the beginning, projects are part of a program that requires coordination.
D. In the beginning, projects start with detailed inputs that need to be explained.