Answer:B) Purge the tapes of all data before disposing of them.
Explanation: Backup tapes are the storage device that contains the data that is copied from the primary storage and behaves as the backup if the hard drive of the system gets damaged.
If the life cycle of the backup tapes is about to end , then the removal of the data should be done so that it cannot be retrieved from the unknown sources. So purging is the method of completely eliminating the backup data because it hold the information of any particular system.After purging the tape can be disposed.Thus, the correct option is option(B).
Other option are incorrect because erasing the data will not remove the content from media and no need of the storage if they are at the end stage of cycle .