You are working on a new project in your city to construct an environmentally friendly landfill. The existing site is so undesirable that many residents have moved to other neighboring cities because of their proximity to it. However, even though the project has the
support of the public, you need to have a number of hearings of the city's government before you are authorized to begin work. As you are in the planning phase of the project, you are waiting for these hearings to be scheduled and held before you can begin site
preparation. These hearings are an example of______________


A. A milestone
B. An external dependency
C. An item to be scheduled as a fragnet
D. A mandatory dependency