Explanation
Confidentiality is the security objective that best ensures that information is protected against unauthorized disclosure. Confidentiality means that only authorized parties can access or view sensitive or classified information. Integrity means that information is accurate and consistent and has not been tampered with or modified by unauthorized parties. Authenticity means that information is genuine and trustworthy and has not been forged or misrepresented by unauthorized parties. Nonrepudiation means that information can be verified and proven to be sent or received by a specific party without any possibility of denial. References:
https://www.csoonline.com/article/3513899/the-cia-triad-definition-components-and-examples.html

Explanation/Reference:
Explanation:
The recovery point objective (RPO) defines the maximum loss of data (in terms of time) acceptable by the business (i.e., age of data to be restored). It will directly determine the basic elements of the backup strategy frequency of the backups and what kind of backup is the most appropriate (disk-to-disk, on tape, mirroring). The volume of data will be used to determine the capacity of the backup solution. The recovery time objective (RTO) - the time between disaster and return to normal operation - will not have any impact on the backup strategy. The availability to restore backups in a time frame consistent with the interruption window will have to be checked and will influence the strategy (e.g., full backup vs.
incremental), but this will not be the primary factor.

Calculating the return on investment (ROD will most closely align security with the impact on the bottom line. Frequency and cost of incidents are factors that go into determining the impact on the business but, by themselves, are insufficient. Comparing spending against similar organizations can be problematic since similar organizations may have different business goals and appetites for risk.

Explanation
Mandatory access controls restrict access to files based on the security classification of the file. This prevents users from sharing files with unauthorized users. Role-based access controls grant access according to the role assigned to a user; they do not prohibit file sharing. Discretionary and lattice-based access controls are not as effective as mandatory access controls in preventing file sharing. A walled garden is an environment that controls a user's access to web content and services. In effect, the walled garden directs the user's navigation within particular areas, and does not necessarily prevent sharing of other material.

Section: INFORMATION SECURITY PROGRAM MANAGEMENT
Explanation