You're Responsible for Keeping Track of Inventory for a Huge

You're responsible for keeping track of inventory for a huge, national chain of bookstores, which is challenging since thousands of products are constantly being delivered, stocked, sold, and transferred through your stores. So, if you could employ any supply chain management system to make your job easier, which of the following would you choose?

A) RFID, a tool that requires placing a tiny tracking chip on all materials
B) ERP, an integrated software that consolidates data from all of your stores
C) Logistical cost control, a method of evaluating how to add value for your customers through logistical changes
D) Value chain management, a means of managing the complete sequence of suppliers and activities that contribute to the delivery of goods