Which of the following courses of action would ONLY identify the known vulnerability?

An alert has been distributed throughout the information security community regarding a critical Apache vulnerability.

Which of the following courses of action would ONLY identify the known vulnerability?
A . Perform an unauthenticated vulnerability scan on all servers in the environment.
B . Perform a scan for the specific vulnerability on all web servers.
C . Perform a web vulnerability scan on all servers in the environment.
D . Perform an authenticated scan on all web servers in the environment.

Answer: B