Read rights: The permission to view or access the content of a file or a folder1.

Application files: The files that contain the code, data, or resources of an application or a program2.

Controlled server environment: A server environment that is managed and secured by a set of policies, procedures, and tools3.

Business process owner: The person who is responsible for the design, execution, and performance of a business process.

Read rights to application files in a controlled server environment should be approved by the business process owner. The business process owner is the person who has the authority and accountability for the business process that uses or depends on the application files. The businessprocess owner should approve the read rights to application files in a controlled server environment to:

Ensure that the read rights are aligned with the business needs and objectives

Prevent unauthorized or unnecessary access to the application files

Protect the confidentiality, integrity, and availability of the application files

Comply with the relevant laws and regulations that govern the access to the application files

The other options are not the best choices for approving the read rights to application files in a controlled server environment, because they do not have the same level of authority, responsibility, or knowledge as the business process owner. The database administrator, who is the person who manages and maintains the database systems and data, may have the technical skills and access to grant the read rights to application files, but they may not have the business insight or approval to do so. The chief information officer, who is the person who oversees the IT strategy and operations of the organization, may have the executive power and oversight to approve the read rights to application files, but they may not have the specific or detailed knowledge of the business process or the application files. The systems administrator, who is the person who configures and maintains the server systems and networks, may have the administrative privileges and tools to grant the read rights to application files, but they may not have the business understanding or authorization to do so.

References = Read Permission - an overview | ScienceDirect Topics, What is an Application File? - Definition from Techopedia, What is a Server Environment? - Definition from Techopedia, [Business Process Owner: Definition, Roles, and Responsibilities]