Which of the following is a technique for defining access controls?

Comprehensive and Detailed Explanation from Exact Extract:

In ABAP CDS access controls, the technique used is inheritance, which allows one access control object to reuse rules defined in another.

This makes authorization definitions consistent, reusable, and maintainable, which is essential in RAP applications where business objects require layered and reusable authorization concepts.

Options such as Redefinition, Singleton, or Casting belong to OO concepts, not to access control in CDS.

Verified Study Guide Reference: ABAP Cloud Documentation – Defining Access Controls in CDS and RAP BOs.