You have a SharePoint Server farm.
You have the following three types of document libraries: expense reports, purchase orders, and invoices. Each document in the libraries has an associated project code and cost center.
You need to ensure that when users check in expense reports, purchase orders, and invoices, the documents are associated to a project code and a cost center. The project code and cost center must be in a consistent format across all the document libraries. The solution must minimize administrative effort.
What should you include in the solution?
A. managed properties
B. site content types
C. site columns
D. site templates
