Which of the following statements about Discretionary Access Control List (DACL) is true?

A.
It is a list containing user accounts, groups, and computers that are allowed (or denied) access to the object.

B.
It specifies whether an audit activity should be performed when an object attempts to access a resource.

C.
It is a unique number that identifies a user, group, and computer account.

D.
It is a rule list containing access control entries.

Explanation:

Discretionary Access Control List (DACL) is a list containing user accounts, groups, and computers that are allowed (or denied) access to the object.
Answer option D is incorrect. Access Control List (ACL) is a rule list containing access control entries that are used to allow or deny access to network resources.

Answer option B is incorrect. System Access Control List (SACL) specifies whether an audit activity should be performed when an object attempts to access a resource.

Answer option C is incorrect. Security Identifier (SID) is a unique number that identifies a user, group, and computer account. When a user, group, or computer account is created, a unique SID is issued.

Reference: "http://en.wikipedia.org/wiki/Access_control#Discretionary_Access_Control"