Monica wants to prevent users from sharing data and cares more about control than flexibility. What type of access control model is best suited to ensuring central control over file access?

Mandatory access control (MAC) is used in scenarios where users should not have the ability to grant access to files. Role-based access control and rule- based access control both provide more flexibility, and they are more commonly used than mandatory access control in cases where that is desired. Discretionary access control (DAC) allows users to grant access to other users and does not fit the requirements either.