When Retail Store Tracking Data Are Not Collected by Scanners

When retail store tracking data are not collected by scanners, they may be collected by:

A) income tax documents
B) auditors who prepare the financial statements for the firm and have access to sales records
C) auditors who conduct retail-store audits
D) customers of stores who are surveyed and asked for their recollections of the inventory levels in stores they have recently patronized
E) field services firms using CATI (Computer Assisted Tracking Intelligence) systems