main()_x005F_x000D_ {_x005F_x000D_ fork();_x005F_x000D_  _x005F_x000D_ printf(“Hello World!”);_x005F_x000D_ }_x005F_x000D_ Output for the above unix program is

• A. Hello World!
• B. Hello World!Hello World!
• C. Hello World
• D. None