1. After you install an 80 GB drive in a desktop PC, only 20 GB is displayed when the system is started. No extra disk space is shown in Windows Explorer. How can you make use of the rest of the space...

1. After you install an 80 GB drive in a desktop PC, only 20 GB is displayed when the system is started. No extra disk space is shown in Windows Explorer. How can you make use of the rest of the space on the disk without losing data? ? A. Use the Disk Manager utility to partition the rest of the disk space on the drive. ? B. Use the Device Manager to recalculate the geometry of the disk to use the additional space on the drive. ? C. You must back up the data on the disk and reformat it to include the additional space. ? D. You must repartition the drive and start over from the beginning.