Preventive Technical Controls are usually built:

A.
By using MD5.

B.
Into an operating system.

C.
By security officer.

D.
By security administrator.

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.