Final answer:
The C-I-A triad refers to Confidentiality, Integrity, and Availability. The answer to making sure information is obtainable when needed is Availability. This ensures that data and systems are accessible to authorized users upon request.
Step-by-step explanation:
The part of the C-I-A triad that refers to making sure information is obtainable when needed is c) Availability. The CIA triad is a widely used model that guides policies for information security within an organization, and it stands for Confidentiality, Integrity, and Availability. Confidentiality ensures that sensitive information is accessed only by an authorized person. Integrity ensures that the information is reliable and accurate. Availability, the answer to your question, ensures that the data and systems are available to authorized users when they need them.