A. public class Helloworld {public static void main(string[] args) {System.out.println("helloworld!");}}

B. public class Helloworld {public static void main(String[] args) {system.out.println("helloworld!")}}

C. public class Helloworld {public static void main(String[] args) {System.out.println("helloworld!");}}

D. public class Helloworld {public static void main(String[] args); {System.out.println("helloworld!");}