The correct answer is 'Organized crime'. This answer is appropriate because the details such as the specificity of the attack (targeting credit card data), the use of advanced malware, persistence, and the indication of financial motivation are representative of criminal organizations. They often conduct operations motivated by direct financial gain. In contrast, state-sponsored actors may focus on espionage or large-scale disruption, and hacktivists generally have ideological motives behind their actions. Lone actors usually do not have the resources to orchestrate such a complex and targeted campaign.