The risk of users circumventing application controls is the most significant exposure when an application uses individual user accounts to access the underlying database. This is because users may have direct access to the data and bypass the validation, authorization, and logging mechanisms that are implemented at the application level. Users may also be able to modify or delete data without proper authorization or audit trail.
The other options are less significant exposures, as they do not directly affect the integrity or confidentiality of the data. References = Risk IT Framework, ISACA, 2009, page 35; CRISC Review Manual, 6th Edition, ISACA, 2015, page 214.

According to the ISACA Risk and Information Systems Control study guide and handbook, the information owner is the official with statutory or operational authority for specified information and responsibility for establishing the controls for its generation, collection, processing, dissemination, and disposal. The information owner is also responsible for authorizing access to the information within their domain, based on the principle of least privilege and the need to know. Therefore, the information owner should be accountable for authorizing information system access to internal users12
1: ISACA Risk and Information Systems Control Study Guide, 4th Edition, page 33 2: ISACA Risk and Information Systems Control Handbook, 1st Edition, page 25

An IT policy is a document that defines the rules, standards, and procedures for the use, management, and security of IT resources within an organization. An IT policy should be aligned to the business requirements, which are the needs, expectations, and objectives of the business stakeholders, such as customers, employees, managers, partners, regulators, etc. An IT policy that is aligned to the business requirements can help support the business strategy, improve the business performance, and enhance the business value. A key performance indicator (KPI) is a metric that measures the achievement of a specific goal or objective. A KPI should be relevant, measurable, achievable, realistic, and time-bound. The best KPI for determining how well an IT policy is aligned to the business requirements is the number of exceptions to the policy. An exception to the policy is a deviation or violation of the policy rules, standards, or procedures, which may be intentional or unintentional, authorized or unauthorized, justified or unjustified. The number of exceptions to the policy can indicate how well the policy is understood, communicated, implemented, and enforced within the organization. The number of exceptions to the policy can also indicate how well the policy reflects the current and future business needs and expectations, and how flexible and adaptable the policy is to the changing business environment. A low number of exceptions to the policy can suggest that the policy is well aligned to the business requirements, while a high number of exceptions to the policy can suggest that the policy is misaligned or outdated, and may need to be reviewed or revised. References = Key Performance Indicator (KPI): Definition, Types, and Examples, Business KPIs: 5 important characteristics to be effective, What is a KPI? How To Choose the Best KPIs for Your Business - HubSpot Blog.

In addition to the risk register, which is a tool to document and monitor the risks that affect the organization, a risk practitioner should review the business objectives of the organization to develop an understanding of its risk profile. The risk profile is a description of the set of risks that the organization faces in relation to its goals and strategies. By reviewing the business objectives, the risk practitioner can identify the sources, drivers, and consequences of the risks, as well as the alignment, prioritization, and tolerance of the risks. The business objectives also provide the context and criteria for evaluating and managing the risks. The other options are not the best choices to review for developing an understanding of the organization's risk profile, as they do not capture the full scope and nature of the risks. The control catalog is a list of the existing controls that are implemented to mitigate the risks, but it does not reflect the effectiveness, efficiency, or sufficiency of the controls. The asset profile is a description of the resources and capabilities that the organization possesses or relies on, but it does not indicate the value, vulnerability, or interdependency of the assets. The key risk indicators (KRIs) are metrics that measure the level and trend of the risks, but they do not explain the causes, impacts, or responses to the risks. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.2, Page 49.