Explanation
Positioning security as a business enabler is the BEST way to obtain organization-wide support for an information security program, because it helps to demonstrate the value and benefits of security to the organization's strategic objectives, performance, and reputation. By aligning security with the business goals and needs, the information security manager can gain the buy-in and commitment of senior management and other stakeholders, and foster a positive security culture across the organization.
References =
CISM Review Manual, 16th Edition, ISACA, 2020, p. 37: "The information security manager should position information security as a business enabler that supports the achievement of the enterprise's business objectives and adds value to the enterprise." CISM Review Manual, 16th Edition, ISACA, 2020, p. 39: "The information security manager should communicate the value and benefits of information security to senior management and other stakeholders to obtain their support and commitment for the information security program." CISM Review Manual, 16th Edition, ISACA, 2020, p. 40: "The information security manager should promote a positive security culture within the enterprise by influencing the behavior and attitude of employees and other parties toward information security."

Explanation
According to the Certified Information Security Manager (CISM) Study Manual, a mature information security culture is one in which staff members regularly consider risk in their decisions. This means that they are aware of the risks associated with their actions and take preventative steps to reduce the likelihood of negative outcomes. Other indicators of a mature information security culture include mandatory information security training for all staff, documented and communicated information security policies, and regular interaction between the CISO and the board.
Maintaining an information security governance framework enables an organization to identify, assess, and manage its information security risks. By establishing policies, procedures, and controls that are aligned with the organization's objectives and risk tolerance, an information security governance framework helps ensure that information security risks are managed to an acceptable level.
According to the Certified Information Security Manager (CISM) Study Manual, "Information security governance provides a framework for managing and controlling information security practices and technologies at an enterprise level. Its primary objective is to manage and reduce risk through a process of identification, assessment, and management of those risks." While the other options listed (prioritizing resources, communicating guidelines, and remaining compliant with regulations) are also important benefits of maintaining an information security governance framework, they are all secondary to the primary benefit of managing business risks to an acceptable level.
Reference:
Certified Information Security Manager (CISM) Study Manual, 15th Edition, Pages 60-63.

According to the Certified Information Security Manager (CISM) Study Guide, one of the primary responsibilities of an information security manager is to ensure that changes to systems and processes are managed in a secure and controlled manner. The change management procedure that is most likely to cause concern for an information security manager is when the development manager migrates programs into production without proper oversight or control. This can increase the risk of unauthorized changes being made to systems and data, and can also increase the risk of configuration errors or other issues that can negatively impact the security and availability of systems. To mitigate these risks, it is important for the information security manager to work closely with the development team to establish and enforce change management procedures that ensure that all changes are properly approved, tested, and implemented in a controlled manner.