Answer:
80 or 4443
Step-by-step explanation:
Sandy would likely want to monitor port 80, as this is the default port used for HTTP (unsecured) web browsing traffic. Port 443 is also commonly used for HTTPS (secured) traffic. By monitoring these ports, Sandy would be able to see the URLs of the websites that the user is visiting, as well as any unencrypted data sent or received on those websites.