Explanation/Reference:
Explanation:
While it is important that environmental concerns are addressed they are part of the Physical Security Domain.
The Operations Security domain is concerned with the controls that are used to protect hardware, software, and media resources from the following:
Threats in an operating environment

Internal or external intruders

Operators who are inappropriately accessing resources

Incorrect Answers:
A: Controls over hardware are a critical security aspect of Operations Controls.
B: Controls over the data media used are a critical security aspect of Operations Controls.
C: Controls over the operators using resources are a critical security aspect of Operations Controls.
References:
Krutz, Ronald L. and Russel Dean Vines, The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, New York, 2001, p. 207