ATA-100 Is the Channel Standard Used to Represent a Disk

Multiple Choice

ATA-100 is the channel standard used to represent a disk.What does the number 100 indicate here?

A) The maximum transfer rate of the disk is 100 MB per second.
B) The disk has 100 circles per mm of its diameter.
C) The disk's rotation speed is 100 cycles per second.
D) The total disk space of the disk is 100 GB.