The most important objective from a cost perspective for considering aggregated risk responses in an organization is to address more than one risk response. Aggregated risk responses are risk responses that can affect multiple risks or objectives simultaneously. By addressing more than one risk response, the organization can achieve cost efficiency and effectiveness in risk management. Prioritizing risk response options, reducing likelihood, and reducing impact are other possible objectives, but they are not as important from a cost perspective as addressing more than one risk response. References = ISACA Certified in Risk and Information Systems Control (CRISC) Certification Exam Question and Answers, question 10; CRISC Review Manual, 6th Edition, page 140.