为自己加油

在Java中，创建一个向文件"file.txt"追加内容的输出流对象的语句有

A.OutputStream out=new FileOutputStream("file.txt");
B.OutputStream out=new FileOutputStream("file.txt", "append");
C.FileOutputStream out=new FileOutputStream("file.txt", true);
D.FileOutputStream out=new FileOutputStream(new File("file.txt"));