When the target thread periodically checks if it should terminate and terminates itself in an orderly manner, it is called?

When the target thread periodically checks if it should terminate and

1.	When the target thread periodically checks if it should terminate and terminates itself in an orderly manner, it is called?
A.	asynchronous cancellation
B.	systematic cancellation
C.	sudden termination
D.	deferred cancellation
Answer» E.