Your application uses two threads， named threadOne and threadTwo. You need to modify the code to prevent the execution of threadOne until threadTwo completes execution. What should you do？（）

A.Configure threadOne to run at a lower priority.

B.Configure threadTwo to run at a higher priority.

C.Use a WaitCallback delegate to synchronize the threads.

D.Call the Sleep method of threadOne.

E.Call the SpinLock method of threadOne.