Concurrent supply chains are made possible by which technology?

My right answer is ====== INTERNET

Let me wait for experts' opinion as I have no idea about it. But i think it is made possible by supply chain management system. 

i fully agree with the answers been added by experts..........thanks.

internet is my answer..........

The answer for this is " INTERNET "

The Answer is Internet.

A key to the reduced cost in Supply chain is Internet. It gives  available information that increases the transparency and speed of transactions. Members of supply chains can quickly and reliably find the specific information they need to complete an exchange of goods or services, and receive rapid payment.

Internet technology>>>>>>>>>>>>>>>

Supply chain management systems, are a network of businesses linked together to provide materials and services to an end user. The goal of these systems is to coordinate functions and strategies, throughout a company, and across businesses, to improve the performance of all parties involved. Because supply chain management systems link several different branches of an organization, each of these systems is different, and requires fine tuning to work. Running remote diagnostics via logistics software can give integrity to a supply chain's operations.

Hence supply chain management systems would enable efficient supply chain function.

Choice -B

Internet

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C) Supply chain management systems

Thank you for the invitation I agree with the experts answers