Data records in Pega have specific functionalities regarding how they manage and display data:
A; Data records define permissible values for data fields. Data records often specify the allowable values that can be entered into specific fields, helping to maintain data integrity and adherence to business rules.
D: Data records are displayed in a drop-down list by default. By default, data records can be configured to populate drop-down lists in user interfaces, providing a user-friendly method to select from predefined options.

To display multiple options (like balance transfer offers) on a form where only one can be selected at a time, the suitable control types are:
B: Radio buttons. Radio buttons are ideal for allowing users to select one option from multiple choices. They are mutually exclusive, which means selecting one option deselects any other previously selected option.
D: Drop-down list. A drop-down list also allows users to select one option from multiple choices presented in a compact form. It ensures that only one selection can be made at any time, fitting the requirement to prevent multiple selections.