Which Statement Regarding Efficient Supply Chains Is Most Accurate

Which statement regarding efficient supply chains is most accurate?

A) Efficient supply chains often operate with relatively low inventory levels.
B) Efficient supply chains use common platforms and common components across several products.
C) Efficient supply chains rely on maintaining large geographically dispersed inventory warehouses.
D) Efficient supply chains traditionally use expensive,but faster,modes of transportation.
E) Efficient supply chains emphasize economies of scale by increasing the variety of system configurations offered.