A new service request asks for all members of the finance department to have access to the accounting department's file server VMs on the private cloud environment. Which of the following is the MOST

Setting up duplicate file server VMs with two-way replication ensures that both departments have their own access control domains while keeping the data synchronized. This is efficient because it avoids direct modification of an existing department's security configuration, reduces potential for human error in managing individual user access across departments, and ensures data consistency with minimal administrative overhead once configured, especially in a private cloud environment.

Adding individual users from the finance department to the accounting department's access lists is inefficient and prone to errors, especially as departments grow or change.

Implementing single sign-on (SSO) and two-factor authentication (2FA) is a security enhancement for user authentication, but it does not directly address the specific file access permission request between departments.

Creating a new group for the finance department to allow access to the accounting department's file server VMs would grant them direct access to the existing accounting VM's resources, which might not be desirable due to security, auditing, or operational separation concerns between departments, making replication a more efficient solution for departmental independence.