Centralizing the risk management function enables the organization to have a consistent approach to reporting risks and their impacts. This allows for better monitoring of the impact against the overall project risk exposure, which helps in making informed decisions and allocating resources effectively.
According to the PMI-RMP Exam Content Outline1, one of the tasks in the domain of risk governance is to
"establish and maintain a centralized risk management function to support the project and organizational objectives". A centralized risk management function can help resolve the problem of inconsistent risk reporting by providing a common framework, methodology, and standards for risk management across the organization. One of the benefits of centralizing the risk management function is that it allows monitoring the impact of individual project risks against the overall project risk exposure, as well as the organizational risk appetite and tolerance. This can help the CEO and other senior management to make informed decisions and allocate resources accordingly. Therefore, the best answer is B.
References: 1: PMI-RMP Exam Content Outline, page 6.