A technician performs a virus cleaning on a computer that has been redirecting all browsers to a phishing website. System Restore was turned off before the cleaning. The technician runs the machine through several scanners, and then tests for redirection. A smaller number of sites are still redirecting to the phishing website. The antivirus software correctly blocks the website. Which of the following should the technician do NEXT? 

Answer options:

A. Check the contents of the hosts file
B. Do a System Restore to a date before the infection
C. Rerun the antivirus scan with higher sensitivity
D. Rebuild the OS on the machine

A