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.