___________________ are the technical ways of restricting who or what can access system
resources.

A.
Preventive Manual Controls

B.
Detective Technical Controls

C.
Preventive Circuit Controls

D.
Preventive Technical Controls

Explanation:
Preventive Technical Controls are the technical ways of restricting who or what can
access system resources and what type of access is permitted. Its purpose is to protect
the OS and other systems from unauthorized modification or manipulation. It is usually
built into an operating system, or it can be a part of an application or program, or an
add-on security package, or special components to regulate communication between
computers. It also protects the integrity and availability by limiting the number of
users and/or processes. These controls also protect confidential information from being
disclosed to unauthorized persons.