What data type should be selected for the 'RA ID' field in the new table?

Selecting the AutoNumber data type for the 'RA ID' field is appropriate if the goal is to generate a unique identifier for each record automatically. AutoNumber is designed specifically for this purpose, ensuring that each entry in the table receives a distinct and sequential number as the record is created. This helps maintain data integrity and simplifies database management since users do not have to manually input or track these identifiers.

In contrast, using Text could lead to potential duplicates and would require additional validation processes to ensure uniqueness. The Number data type can be useful for numeric entries but lacks the sequential unique generation feature inherent to AutoNumber. Finally, the Date/Time data type is relevant for recording dates and times but does not serve as a unique identifier for records. Thus, the correct choice, AutoNumber, effectively fulfills the requirement for a unique and automatically generated 'RA ID'.