public class X {   public static void main （Stringargs） {   string s = new string （“Hello”）；   modify（s）；   System.out.printIn（s）；   }   public static void modify （String s） {   s += “world!”；   }   }   What is the result？（） 

• A、The program runs and prints “Hello”
• B、An error causes compilation to fail.
• C、The program runs and prints “Hello world!”
• D、The program runs but aborts with an exception.