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 theremote 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.