Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected...

Cross-Site Scripting injects malicious script into a trusted page so the victim's browser executes attacker-controlled code. Common XSS outcomes include session or cookie theft, unauthorized actions, and data exposure. Option C (Cookie Stealing) is correct because cookie stealing is a classic XSS impact.

Why the other options are incorrect:

A. Spyware Callback: Spyware Callback is outbound C2 protection. It is not the browser/URL control being tested here.

B. Anonymizers: Anonymizer controls restrict proxy/anonymity services. They do not represent the malicious-content category in this question.

D. IRC Tunneling: IRC tunneling is a specific evasive communication method. The question’s answer is the broader protection control being tested.