[单项选择]正确生成RandomAccessFile对象的语句的是 A. File f=new File("readFile"); B. RandomAccessFile raF=new RandomAccessFile(d:/mydir/File3.txt,"rw"); C. RandomAccessFile raF=new RandomAccessFile("readwriteFile","rw"); D. RandomAccessFile raF=new RandomAceessFile("readwriteFile" ,rw);