A small server is operating with a single ATA 66 drive on the primary IDE interface. An additional ATA 100 drive is added to the primary IDE interface. How will the drives MOST likely perform?

A.
Each drive will operate at approximately half its optimum performance rate.

B.
Each drive will operate at its optimum performance rate.

C.
Both drives will operate at the ATA 66 performance rate.

D.
Both drives will operate at the ATA 100 performance rate.