Final Answer:
Licensees must protect Critical Digital Assets (CDAs) from cyber-attacks that would adversely impact the safety, security, and reliability of the operational technology systems within a critical infrastructure.
Step-by-step explanation:
Critical Digital Assets (CDAs) are components of operational technology systems within critical infrastructure sectors. These assets play a vital role in ensuring the safety, security, and reliability of essential services, such as energy, transportation, and water supply. Licensees, who are responsible for the operation and maintenance of critical infrastructure, must safeguard CDAs from cyber-attacks to prevent adverse impacts on the operational technology systems.
The term "adversely impact" implies potential harm or disruption to the normal functioning of critical infrastructure. Cyber-attacks on CDAs could lead to disruptions, unauthorized access, or manipulation of systems, posing risks to public safety and national security.