The most effective way for a CIO to govern business unit deployment of shadow IT applications in a cloud environment is to educate the executive team about the risk associated with shadow ITapplications. This is because shadow IT applications are often deployed without the knowledge or approval of the central IT organization, and may pose security, compliance, and performance risks to the enterprise. By raising awareness of these risks among the executive team, the CIO can foster a culture of IT governance and alignment, and encourage the business units to follow the established application implementation process. References: CGEIT Certification | Certified in Governance of Enterprise IT | ISACA1, IT Governance: Definitions, Frameworks and Planning - ProjectManager2

Key performance indicators (KPIs) are measurable values that demonstrate how effectively an organization is achieving its key business objectives1. KPIs help to track and evaluate the progress and success of a strategy, and to communicate the results to the relevant stakeholders2. Once the strategic vision has been established, identifying KPIs would be the best activity for supporting the implementation of performance measures, because they provide a clear and quantifiable way to measure the performance of the strategy against the vision3. KPIs should be aligned with the strategic vision, relevant to the business context, specific, measurable, achievable, realistic, and time-bound4.
References :=
What is a Key Performance Indicator (KPI)? | Klipfolio
Key Performance Indicators (KPIs) - Definition, Types & Examples
How to Develop Key Performance Indicators - Strategy Management Group
How to Set SMART KPIs for Your Business - The Balance Small Business

A risk assessment is a process of identifying, analyzing, and evaluating the potential risks that may affect the achievement of an objective, such as selling products online. A risk assessment can help the CIO to advise the board of directors of the possible threats, vulnerabilities, and impacts that may arise from the online sales strategy, such as cyberattacks, data breaches, fraud, legal compliance, customer satisfaction, and reputation. A risk assessment can also help the CIO to recommend the appropriate risk response measures, such as avoiding, reducing, transferring, or accepting the risks.
The other options are not as effective, as they do not address the potential problems with the online sales strategy in a holistic and systematic way. Reviewing the security framework may help to ensure that the online sales platform is secure and resilient, but it does not consider other aspects of risk, such as business, legal, or operational. Conducting a return on investment (ROI) analysis may help to estimate the financial benefits and costs of the online sales strategy, but it does not account for the uncertainties and variabilities of risk. Reviewing the enterprise architecture (EA) may help to align the online sales strategy with the business goals and capabilities, but it does not assess the likelihood and consequences of risk.

The best way to determine if staff competency is the root cause of the performance problems is to compare the required staff competencies with the current skills inventory of the service center staff. This will help identify any gaps or mismatches between what is expected and what is available in terms of skills and knowledge. References: CGEIT Review Manual, 7th Edition, page 113.

According to the web search results, a SaaS contract is a legal agreement between a SaaS provider and a customer that defines the terms and conditions of using the SaaS solution, such as the scope, duration, price, service level, data ownership, security, privacy, compliance, etc. The most effective way to reduce the risk associated with the SaaS solution is to include risk-related requirements in the SaaS contract, such as the following12:
The SaaS provider should comply with the relevant laws and regulations that apply to the customer's industry and location, such as GDPR, HIPAA, PCI DSS, etc.
The SaaS provider should implement adequate security measures and controls to protect the customer's data from unauthorized access, modification, disclosure or loss, such as encryption, authentication, authorization, backup, etc.
The SaaS provider should provide regular reports and audits on the security and performance of the SaaS solution, as well as notify the customer of any security incidents or breaches that may affect the customer's data.
The SaaS provider should guarantee a certain level of availability and reliability of the SaaS solution, and specify the remedies or penalties for any service downtime or disruption.
The SaaS provider should allow the customer to access, export, delete or transfer their data at any time, and ensure that the data are erased or returned to the customer upon termination of the contract.
The SaaS provider should indemnify and hold harmless the customer from any claims, damages or liabilities arising from the use of the SaaS solution.
Including risk-related requirements in the SaaS contract will help to clarify the roles and responsibilities of both parties, as well as to establish trust and accountability between them. It will also help to mitigate the potential risks and challenges of using a hosted SaaS solution34, such as data loss, unauthorized access, compliance violations, service outages, vendor lock-in, etc. The other options are not as effective as including risk-related requirements in the SaaS contract, as they do not address the contractual and legal aspects of using a hosted SaaS solution.