Final Answer:
The malware that encrypts files and then offers to sell the decryption code to the victim is called C) Ransomware.
Step-by-step explanation:
Ransomware is a type of malicious software designed to encrypt files on a victim's computer or network, rendering them inaccessible. The attacker then demands a ransom, typically in cryptocurrency, in exchange for providing the decryption key. This form of extortion can have severe consequences for individuals and organizations, often leading to data loss or financial harm. Ransomware attacks are commonly delivered through phishing emails, malicious attachments, or compromised websites. Once the malware is executed, it encrypts files, and the victim is presented with a ransom note outlining the payment details for obtaining the decryption key.
Option C is the answer.