What is the major difference between vertical integration and outsourcing? Select one: O a. Outsourcing uses external suppliers to perform some production/service functions while production/service functions through vertical integration are strictly in-house. b. Outsourcing is a long term operations strategy where vertical integration is short term. O c. Vertical integration is ownership of a part of the supply chain, outsourcing has no ownership O d. Vertical integration is usually limited to services, where as outsourcing usually deals with production of goods. O e. Outsourcing is ownership of a part of the supply chain, vertical integration has no ownership