Which of the Following Are Definitions of Supply Chain Management

Which of the following are definitions of Supply Chain Management (SCM) currently in use by American businesses?

A) Supply Chain Management integrates supply and demand management within and across companies.
B) Supply Chain Management is the systemic, strategic coordination of the traditional business functions and the tactics across these business functions within a particular company and across businesses within the supply chain, for the purposes of improving the long term performance of the individual companies and the supply chain as a whole.
C) Supply Chain Management is a seamless, coordinated processes that optimize informational and operational flows between departments and partners in the supply chain, which improves service capabilities while achieving lower total supply chain costs.
D) All of these are definitions of SCM currently used by American businesses.