To answer this question, we need to understand the different forms of backup options available today.
Option A) CD-ROM - This option is incorrect because CD-ROMs are not commonly used for backups today. They have limited storage capacity and are not as efficient or reliable as other backup options.
Option B) Optical Drives - This option is incorrect because optical drives, such as DVD or Blu-ray drives, are also not commonly used for backups today. They have similar limitations as CD-ROMs in terms of storage capacity and reliability.
Option C) Server Hard Drives - This option is incorrect because while server hard drives are commonly used for storing data, they are not typically used as the primary form of backup. Server hard drives are more often used for data storage and accessibility rather than backup purposes.
Option D) Tape - This option is correct because tape backups are still the most common form of backup used today. Tape backup solutions offer high storage capacity, cost-effectiveness, and durability. They are often used for long-term data retention and disaster recovery purposes.
Therefore, the correct answer is D) Tape. This option is correct because tape backups are the most common form of backup used today due to their reliability, cost-effectiveness, and storage capabilities.