Which Statement Regarding Efficient Supply Chains Is Most Accurate

Which statement regarding efficient supply chains is most accurate?

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