Hierarchical Storage Management (HSM) is commonly employed in: 

Answer options:

A. very large data retrieval systems
B. very small data retrieval systems
C. shorter data retrieval systems
D. most data retrieval systems A

Explanation

Hierarchical Storage Management (HSM) is commonly employed in very large data retrieval systems. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 71.