The main reason why data classification control is important to an organization is to ensure that the security controls align with the organizational risk appetite. Data classification control is the process that involves identifying, categorizing, and labeling the data based on its sensitivity, value, and criticality to the organization. Data classification control can help to determine the appropriate level and type of security controls that are required to protect the data from unauthorized access, disclosure, or modification. Data classification control can also help to align the security controls with the organizational risk appetite, which is the amount and type of risk that the organization is willing to accept or tolerate. Data classification control can help to ensure that the security controls are proportional and cost-effective, and that they balance the security needs and the business objectives of the organization . References: [CISSP CBK, Fifth Edition, Chapter 2, page 104]; [100 CISSP Questions, Answers and Explanations, Question 17].

Explanation/Reference:
Explanation:
Business rules can run on (base) tables or on views. In database theory, a view is the result set of a stored query on the data, which the database users can query just as they would in a persistent database collection object. This pre-established query command is kept in the database dictionary.
Incorrect Answers:
A: Proxies are not use in databases. In computer networks, a proxy server is a server (computer) which clients (people or computers) use to access other computers.
B: The concept of redundancy is not used within a database to enforce business rules.
D: Business rules use views (or tables) not authentication.
References:
https://en.wikipedia.org/wiki/View_(SQL)

Explanation/Reference:
Within the Systems Development Life Cycle (DSLC) model the design phase, also known as the security requirement phase, transforms requirements, including the security requirements, into a complete System Design Document.
Incorrect Answers:
A: The operation phase describes tasks to operate in a production environment, and is not concerned with development of security requirements.
B: The initiation phase starts when a sponsor identifies a need or an opportunity. During this phase a Concept Proposal, but no security requirements, is created.
D: In the implementation phase the system is implemented into a product production environment. The security requirements have already been developed long before this phase.
References:
Conrad, Eric, Seth Misenar and Joshua Feldman, CISSP Study Guide, 2nd Edition, Syngress, Waltham,
2012, p. 1095