Final answer:
An analysis rating the likelihood and cost of a security incident in an information system is part of Risk Management, not System Integration, Quality Assurance, or Change Management.
Step-by-step explanation:
An analysis of an information system that assesses the probability of a security incident and its associated costs pertains to the field of Risk Management. This is a process in which potential risks are identified, assessed, and prioritized, followed by coordinated and economical application of resources to minimize, monitor, and control the probability or impact of unfortunate events or to maximize the realization of opportunities. Risk management is an essential component of information security, as it involves evaluating and addressing risks that could compromise the security and integrity of information systems.
Integration in this context refers to the process of combining various subsystems or components into one large system, ensuring that each integrated subsystem functions as required. This is also related to information systems but does not focus specifically on risk evaluation. Hence, the correct answer to the student's question is A. Risk Management.