Answer:
I think that the answer is A
The word you are looking for is active.
I'd say B: the amount and type of security placed on an application.
This is a common problem that exists between IT and other user departments. The IT department is well known for closing up certain sites and applications needed by other departments all in the name of security. As a result, it might slow down operations within different department and may cause inefficiency.
The stock market would behave very differently if people had easy access to that data.
Windows nt is not a type of application software.
