Which of the following correctly describes a difference between opening a file in " r+ " mode and opening a file in "w+" mode? Opening a file in " r+ " mode will allow you to read the old contents of the file (which existed prior to you opening it), whereas opening a file in " w+ " mode will not. Opening a file in " r+ " mode will place the file pointer at position 0 in the file, whereas opening a file in "w+" mode will place the file pointer at a position other than 0 in the file. Files opened in " r+ " mode can only be read from, whereas files opened in " w+ " mode can be written to. Opening a file in " r+ " mode will fail if the file does not already exist, whereas opening a file in "w+" mode will create the file if it does not exist