To select the correct choice for "Security Design Principle," the user needs to have knowledge about security design principles and their components.

Now, let's go through each option and explain why it is right or wrong:

A. 1) Keep it easy to understand 2) Secure default access 3) Defense in Depth 4) encapsulation 5) Highest privilege

This option is incorrect because it includes "highest privilege," which means giving users the maximum level of access, which is not a good security practice as it can lead to data breaches or unauthorized access. The other principles listed are correct.

B. 1) Keep it easy to understand 2) Secure access 3) Defense in Depth 4) encapsulation 5) Highest privilege

This option is incorrect because it lacks the principle of "least privilege," which is a fundamental security principle that means providing users with the minimum level of access they need to perform their tasks. This principle helps reduce the attack surface and minimize the damage in case of a breach.

C. 1) Keep it simple and secure 2) Secure default access 3) Defense in Depth 4) Compartmentalization 5) Least privilege

This option is correct. It includes all the essential security design principles, such as secure default access, defense in depth, compartmentalization, and least privilege. Moreover, it emphasizes keeping the design simple, which is always a good practice.

D. 1) Keep it easy to understand 2) Secure access 3) DMZ 4) encapsulation 5) Highest privilege

This option is incorrect because it includes "DMZ," which is not a design principle but a network architecture that separates the internal network from the external network. Also, it includes "highest privilege," which is not a good security practice.

Therefore, the correct answer is:

The Answer is: C