Which of the following RAID levels supports fault tolerance by writing parity to only one drive in the array？（）

A. DHCP
B. ARP
C. DNS
D. RARP

A. A
B. MX
C. PTR
D. AAAA

A. Boot using recovery console and restore the previous driver.
B. Boot the server， press F8 and access last known good configuration.
C. Restore the server using last backup tape.
D. Boot the server with ASR option.