Walgreens drug stores prefer to receive refills of prescriptions through a phone-based system where customers can directly key in the information about the drug. By receiving orders in this manner rather than through a paper-based system or by a phone conversation with a pharmacy employee, Walgreens has been able to save time and money on

A) electronic data interchange.
B) order entry.
C) inventory management.
D) order delivery.
E) materials handling.

B