If the residual risk of the business activity is lower than the acceptable risk level, it means that the existing controls are effectively mitigating the identified risks. In this case, the best course of action is to monitor the effectiveness of the controls and ensure they remain effective. The information security manager should review and test the controls periodically to ensure that they continue to provide adequate protection. It is also essential to update the risk assessment framework to reflect changes in the business environment or risk landscape.

Automated enforcement of password syntax rules is the best method to ensure compliance with password standards. Password syntax rules define the minimum and maximum length, character types, and construction of passwords. By enforcing these rules automatically, the system can prevent users from creating or using weak or insecure passwords that do not meet the standards. According to NIST, password syntax rules should allow at least 8 characters and up to 64 characters, accept all printable ASCII characters and Unicode characters, and encourage the use of long passphrases1. The other options are not methods to ensure compliance with password standards, but rather methods to verify or improve password security. Implementing password-synchronization software can help users manage multiple passwords across different systems, but it does not ensure that the passwords comply with the standards2. Using password-cracking software can help test the strength of passwords and identify weak or compromised ones, but it does not ensure that users follow the standards3. A user-awareness program can help educate users about the importance of password security and the best practices for creating and using passwords, but it does not ensure that users comply with the standards. Reference: 1: NIST Password Guidelines and Best Practices for 2020 - Auth0 2: Password synchronization - Wikipedia 3:

Business criticality is the degree to which an asset is essential to the success of the business and the extent to which its loss or compromise could have a significant impact on the business. Business criticality is one of the main factors that help to determine the inherent risk of an asset, as assets that are more critical to the business tend to have a higher inherent risk.