What is the easiest method to put a thread sleep in the ESB profile for the purpose of troubleshooting and debugging?

What is the easiest method to put a thread sleep in the ESB profile for the purpose of troubleshooting and debugging?
A . Write a custom mediator and put a Java Thread.Sleep
B. Write a custom taskand put a Java Thread.Sleep
C. Write a Script mediator and use Java.lang.Thread.Sleep
D. Write a Class mediator and put a Thread.Sleep

Answer: C