What is a disadvantage of using context-dependent access control on databases?

What is a disadvantage of using context-dependent access control on databases?

A.
It can access other memory addresses.

B.
It can cause concurrency problems.

C.
It increases processing and resource overhead.

D.
It can cause deadlock situations.

Explanation:
C: Relative to other types of access control, context-dependent control requires a lot of overhead and processing, because it makes decisions based on many different variables.