Which of the following would be defined as an absence of safeguard that could be exploited?

A.
A threat

B.
A vulnerability

C.
A risk

D.
An exposure

Explanation:
In IT, a vulnerability is the weakness of a System to be exploited and corrupted by a security hole.
There is always a risk that our systems been vulnerable, with security we cannot make the risk to be
0%, but we can decrease the possibility of a threat becoming in a successful attack through one of
those vulnerabilities. There is no system without vulnerabilities, we need to patch our systems
frequently to reduce the risk of a threat through a vulnerability of one of our systems.