Final answer:
Browser redirection is caused by a type of virus known as a hijack. Hijack viruses are designed to take control of a user's web browser and redirect them to websites that the user did not intend to visit.
Step-by-step explanation:
The correct answer is A. Hijack.
Browser redirection is caused by a type of virus known as a hijack. Hijack viruses are designed to take control of a user's web browser and redirect them to websites that the user did not intend to visit. These viruses can be installed on a computer through malicious downloads or by clicking on links in spam emails. Once installed, they can modify the browser settings to redirect the user to unwanted websites.
For example, if a user's computer is infected with a hijack virus, they may try to visit a legitimate website but end up being redirected to an advertisement or an unsafe website.