What is a consequence of not protecting COMSEC measures effectively?

The choice highlighting the increased risk to national security interests is correct because effective Communications Security (COMSEC) measures are essential for safeguarding sensitive information from unauthorized access and interception. When COMSEC measures are not adequately protected, it exposes communication channels to potential eavesdropping, infiltration, and data breaches. This lack of security can lead to the compromise of critical intelligence and operational plans, ultimately threatening national security. Protecting COMSEC is vital for maintaining the integrity and confidentiality of communications, ensuring that only authorized personnel have access to sensitive information.

In the context of the other options, improved communication efficiency or enhanced cooperation among agencies would not be outcomes of compromised security; rather, they are often a result of robust security measures. Similarly, the reduction in training requirements does not align with the necessity of ongoing training to ensure personnel are competent in maintaining COMSEC standards. Thus, neglecting COMSEC not only undermines operational effectiveness but directly endangers national security as well.