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.