What ensures that the control mechanisms correctly implement the security policy for the entire life cycle of an information system? 

Answer options:

A. Accountability controls
B. Mandatory access controls
C. Assurance procedures
D. Administrative controls

C

Controls provide accountability for individuals accessing information. Assurance procedures ensure that access control mechanisms correctly implement the security policy for the entire life cycle of an information system. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 2: Access control systems (page 33).