A computer on a company network was infected with a zero-day exploit after an employee accidentally opened
an email that contained malicious content. The employee recognized the email as malicious and was
attempting to delete it, but accidentally opened it. Which of the following should be done to prevent this scenario
from occurring again in the future?
Install host-based firewalls on all computers that have an email client installed
Set the email program default to open messages in plain text
Install end-point protection on all computers that access web email
Create new email spam filters to delete all messages from that sender