Caterpillar,the Manufacturer of Earthmoving Equipment,uses Completed Drivetrains (Engines-Transmissions-Axles),drive Train Components,electronic

Caterpillar,the manufacturer of earthmoving equipment,uses completed drivetrains (engines-transmissions-axles) ,drive train components,electronic controls,hydraulic and electrohydraulic components and systems,cooling systems,and undercarriage track systems produced by other organizations in its manufacturing process.What is Caterpillar an example of?

A) a fabricator
B) an installer
C) an original equipment manufacturer
D) a product provider