What must be done for increased security when storing credit card information?

To enhance security when storing credit card information, creating an Encrypted Text field is the most effective approach. Encrypted Text fields specifically provide a secure way to store sensitive data because they encrypt information at rest, ensuring that even if unauthorized access were to occur, the credit card information would remain protected and unreadable without the proper decryption keys. This encryption helps comply with the Payment Card Industry Data Security Standard (PCI DSS), which mandates that cardholder data must be securely stored and protected from potential breaches.

The other options, while potentially useful in different contexts, do not directly relate to the security measures needed for storing sensitive information like credit card data. For instance, configuring different Page Layouts or using different Record Types can help customize user experiences but do not inherently add a layer of security to the data itself. Similarly, adjusting Field-Level Security settings controls visibility for users but does not provide encryption or secure storage for sensitive data. Thus, the creation of an Encrypted Text field is paramount for safeguarding credit card information effectively.