Answer: (D) Access control policies
Step-by-step explanation:
The access control policies is one of the type of security technique which is used in this computing environment for regulating the access in the computer system.
This technique minimize the risk in an organization by providing the strong security system by providing the software for limit the access of the data and the network.
According to the given scenario, Matt managing the security system in the database system as he is more concerning about the database security in the system. Therefore Option (D) is correct.