Locks are one form of boundary protection used in physical security. Which is not true regarding locks?

A.
Most common and accepted physical control

B.
Hard-to-defeat mechanism

C.
Should be used in combination with other controls

D.
Called a "delay" mechanism

Explanation:
Locks are considered "easy-to-defeat" devices because special
tools can be used to break them. Locks should be used in concert with other devices.
They are called "delay mechanisms" because they will only be a bump in the
road for a determined intruder. Even though they have many weaknesses, locks are the
most common and accepted physical security control used today because they are
inexpensive and easy to use.