Blue Nile is an online retailer of diamonds that has used responsive transportation to ship diamonds to customers in the United States, Canada, and several countries in Europe and Asia. Which is the mode of transportation used with this strategy

Responsive transportation is a form of shared transportation system where regular public transit or a personalized taxi that are frequent on a particular route are used to enhance a speedy and economical delivery of items and passengers en - route different destinations but in the same direction.

Looking at the three major modes of transportation which are road , air and sea, the one that suits this scenario is the Air system.

Being an international route , the road system does not fit in , and the ship on the sea is not a good option for responsive transportation considering its speed.