Final answer:
RCAC limits the rows or columns returned based on certain criteria.
Step-by-step explanation:
The definition that best describes RCAC is:
C. It limits the rows or columns returned based on certain criteria.
RCAC, which stands for Row and Column Access Control, is a security measure used in databases. It restricts the data that users can access by defining specific criteria, such as user roles or permissions, that determine which rows or columns they can view or modify.