Final answer:
Discretionary Access Control (DAC) is the access model that allows users some flexibility for information-sharing purposes, where the owner of the resource controls the access permissions.
Step-by-step explanation:
Access Models and Information Sharing Flexibility
The question asks which access model allows users some flexibility for information-sharing purposes. The correct answer is A. DAC, which stands for Discretionary Access Control. Discretionary Access Control allows the owner of the information or resource to decide who is permitted to access it. This model provides flexibility as the owner can grant varying levels of permissions based on the user or group. Moreover, the owner can change these permissions when necessary, allowing for dynamic information sharing that adapts to the organization's needs.
By contrast, B. MAC or Mandatory Access Control is a stricter model where access rights are determined by a central authority based on multiple levels of security. C. RBAC or Role-Based Access Control restricts access based on the roles within an organization, providing less flexibility for individual discretion. And D. MLAC or Mandatory Lattice-Based Access Control is not a commonly recognized access control model in the context of the other options provided.