Information owners are responsible for defining the quality criteria for information within their domain, based on business requirements and stakeholder expectations. Information owners are also accountable for ensuring that information quality is maintained and improved. References := COBIT 5: Enabling Information, chapter
4, section 4.2.1

Appointing an IT representative to the business risk committee is the best way to address senior management's concern about IT investment risks, as it would ensure that IT risks are properly identified, assessed, and communicated to the business stakeholders. The IT representative would also be able to align IT risk management with the enterprise's risk appetite and strategy, and provide input and feedback on the IT investment decisions. The other options are not as effective, as they do not involve direct collaboration and communication between IT and business on risk matters. References: : CGEIT Review Manual (Digital Version), Chapter 4: Risk Optimization, Section 4.3: IT Risk Management, Subsection 4.3.1: IT Risk Management Overview, Page 153 : CGEIT Review Manual (Digital Version), Chapter 4: Risk Optimization, Section 4.3: IT Risk Management, Subsection 4.3.2: IT Risk Management Process, Page 156 : CGEIT Review Manual (Digital Version), Chapter 4: Risk Optimization, Section 4.3: IT Risk Management, Subsection 4.3.5:
Roles and Responsibilities for IT Risk Management, Page 161