What is the error in writeFile() ? public static void writeFile() throws IOException { FileOutputStream foStream null; PrintWriter outFS = null; foStream = new FileOutputStream(); new PrintWriter (foStream); out FS = outFS.println("Java is my favorite language!"); outFS.flush(); foStream.close(); } C O The output stream has not been properly opened O writeFile() should throw PrintException O outFS has not been closed O foStream has not been flushed