Five Brand Managers in a Consumer Products Company Met to Determine

Five brand managers in a consumer products company met to determine how well certain promotions had performed. The data that they needed to analyze consisted of approximately 50 gigabytes of daily point-of-sale (POS) data for each month. The brand managers tried to download the POS data from the mainframe and import it into microcomputer spreadsheets for analysis. Their efforts were unsuccessful, most likely because of:

A) The complexity of the mainframe data structure and the large volume of data.
B) The difficulty of establishing access privileges for each subset of the mainframe data.
C) Inconsistencies in the mainframe data due to lack of integrity constraints on the data files.
D) Error-prone transmission links for downloading the data from the mainframe data files.