What Is Invigilation

What is invigilation?

A) A theft investigation technique which records the physical evidence, facts, and movements, which form part of a fraud.
B) A theft investigation technique which involves close supervision of the suspects during the examination period.
C) A theft investigation technique which is used when large scale fraud is likely and other methods of investigation fail.
D) A theft investigation technique which involves confiscating and searching computers and other electronic sources of information.