Performing due diligence is the most effective initial step in mitigating risks associated with outsourcing. This comprehensive assessment evaluates the vendor's capabilities, security posture, compliance with regulations, and overall suitability for handling sensitive information assets. It ensures that potential risks are identified and addressed before entering into a contractual agreement.
Reference:ISACA CRISC Review Manual, 7th Edition, Chapter 2: IT Risk Assessment, Section: Third-Party Risk Management.

Risk tolerance refers to the acceptable level of variation in outcomes related to specific risks that an organization is willing to withstand. It defines the boundaries within which the organization can operate safely and is often set by senior leadership to guide decision-making processes. In the context of integrating a new acquisition, allowing for variation in the level of risk-taking directly pertains to the organization's risk tolerance.
Reference:ISACA CRISC Review Manual, 7th Edition, Chapter 1: Governance, Section: Risk Governance.

The management action that will most likely change the likelihood rating of a risk scenario related to remote network access is implementing multi-factor authentication. Multi-factor authentication is a technique that requires the user to provide two or more pieces of evidence to verify their identity, such as a password, a token, or a biometric factor. Multi-factor authentication can help to reduce the likelihood of unauthorized or malicious access to the remote network, as it adds an extra layer of security and makes it harder for the attackers to compromise the user credentials. The other options are not as likely to change the likelihood rating of the risk scenario, as they are related to the update, creation, or maintenance of the remote network access, not the verification or protection of the remote network access. References = Risk and Information Systems Control Study Manual, Chapter 3: IT Risk Response, Section 3.3: IT Risk Response Implementation, page 145.

The best time to conduct a risk analysis in a software development project is at each stage of the development life cycle. This is because risks can emerge or change at any point of the project, and they need to be identified, assessed, and managed as soon as possible. By conducting a risk analysis at each stage, the project team can ensure that the risks are aligned with the project objectives, scope, and deliverables, and that the appropriate risk responses are implemented and monitored. Conducting a risk analysis at each stage can also help to avoid or reduce the impact of potential issues, such as schedule delays, cost overruns, quality defects, and customer dissatisfaction. The other options are not the best time to conduct a risk analysis, although they may be useful or necessary depending on the project context and nature. Conducting a risk analysis during the business requirement definitions phase is important, but it is not sufficient, as the risks may change or evolve as the project progresses. Conducting a risk analysis before periodic steering committee meetings is a good practice, but it is not the only time to do so, as the risks may arise or escalate between the meetings.
Conducting a risk analysis during the business case development is a part of the project initiation process, but it is not the most effective time, as the risks may not be fully known or understood at that stage. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2: Risk Identification, Section 2.1:
Risk Identification Process, p. 79-80.