Which of the following is a system management tool?

an event viewer
a firewall
antivirus software
a spam filter

A firewall is a management tool

Explanation:

Anti virus software is also known as an anti-malware. which is a computer program used to protect systems from malware. by either detecting , preventing or removing them from a system.

A firewall is considered a management tool because it helps to protect the system from incoming traffic and also against malware(system virus,Trojan horses and worms). A firewall can either be a computer program or a device it protects systems from hackers and malware hence it is a complete management tool.