What does Ransomware do once it infects a system?

Ransomware is a type of malicious software designed specifically to deny access to a computer system or files until a ransom is paid. Once it infects a system, it typically locks or encrypts files, making them inaccessible to the user. The primary motive behind this action is to extort payment from the victim in exchange for a decryption key or a means to regain access to their data. This behavior is why option B is the correct answer, as it accurately describes the primary function and intent of ransomware.

Other choices, while they may sound beneficial, do not align with the behavior of ransomware. For instance, increasing system performance, improving software usability, or enhancing overall data storage do not reflect the harmful consequences of ransomware, which fundamentally disrupts access to data rather than improves it.