What does level 5 in this enable secret global configuration mode command indicate?
router#enable secret level 5 password

A.
The enable secret password is hashed using MD5.

B.
The enable secret password is hashed using SHA.

C.
The enable secret password is encrypted using Cisco proprietary level 5 encryption.

D.
Set the enable secret command to privilege level 5.

E.
The enable secret password is for accessing exec privilege level 5.

Explanation:

http://www.cisco.com/en/US/docs/ios/12_2/security/configuration/guide/scfpass.html
To configure the router to require an enable password, use either of the following commands in
global configuration mode:
Router(config)# enable password [level level] {password| encryption-type encrypted-password}
Establishes a password for a privilege command mode.
Router(config)# enable secret [level level] {password | encryption-type encrypted-password}
Specifies a secret password, saved using a non-reversible encryption method. (If enable password
and enable secret are both set, users must enter the enable secret password.)
Use either of these commands with the level option to define a password for a specific privilege
level.
After you specify the level and set a password, give the password only to users who need to have
access at this level. Use the privilege level configuration command to specify commands
accessible at various levels.