CompTIA Network+ Question C-10

A network administrator received the following email from a user:
Subject: Free smart phone
Dear user,
please click the following link to get your free smart phone

Which of of the following should the administrator do to prevent all employees from accessing the link in the above email, while still allowing Internet access to the domain?

A. Add to the browser group policy block list.
B. Add DENY TCP ANY EQ 8080 to the firewall ACL
C. Add DENY IP ANY ANY EQ 8080 to the intrusion detection system filter
D. Add to the load balancer

Correct Answer: A