While acquiring the project team, the project manager discovers that a key resource has just resigned from the company. This was the only resource available with the necessary skill set to perform the activity requiring the given expertise. Since hiring and getting a new resource up to speed would take up to three months, the project sponsor authorized the procurement of a specialized contractor. Where will the project management team look to determine how resources are to be acquired externally?

A. Requirements management plan B. Project management plan C. Human resource management plan D. Schedule management plan