Correct Answer: BThe flaw that allowed the attacker to alter the page delivered to the victim's browser by including malicious links is Reflected XSS (Cross-Site Scripting). In a reflected XSS attack, the attacker sends a specially crafted link to the victim. When the victim clicks on the link, the server reflects the malicious script back to the victim's browser. This script is then executed in the context of the trusted website, allowing the attacker to alter the page content, which includes injecting malicious links. Other options like SQL Injection, Cross-Site Request Forgery, and Buffer Overflow do not fit the described scenario.