Verified Answer: According to the CISM Review Manual, 15th Edition, Chapter 3, Section 3.2.1.3, "The appropriate risk treatment option is decided by the chief information security officer (CISO) or the designated risk owner."1

The CISO is the senior executive who is responsible for overseeing and managing the information security program of an organization. The CISO has the authority and expertise to assess the risks, determine the risk appetite and tolerance levels, and select the most suitable risk treatment options for each risk. The CISO also has the accountability and responsibility for implementing, monitoring, and reporting on the risk treatment activities.