Final answer:
Robert should follow the Payment Card Industry Data Security Standard (PCI DSS) to secure systems that process credit card information, as this standard specifically pertains to the protection of payment card data. Thus, the option 2 is the correct answer.
Step-by-step explanation:
Robert, who is responsible for securing systems used to process credit card information, should be guided by the Payment Card Industry Data Security Standard (PCI DSS). This standard provides an actionable framework for developing a robust payment card data security process, including prevention, detection, and appropriate reaction to security incidents. It applies to all entities that store, process, or transmit cardholder data.
Other standards mentioned such as HIPAA are related to healthcare information, SOX (or Sarbanes-Oxley Act) deals with financial practices and reporting of public companies, and GLBA (or Gramm-Leach-Bliley Act) applies to financial institutions' handling of customer's private information. None of these pertain directly to the protection of credit card information like PCI DSS does.