A "bill of materials" is a:

A、listsentbythemanufacturedasachecklistofthematerialsdeliveredtothesite
B、purchaseordercopyindicatingthematerialswhichwereordered.
C、Listindicatingthematerialsrequiredtocompleteaninstallation
D、Listofthematerialsusedmanufacturingtheequipment