Which of the following is a valid Active Directory designation for user John Doe in the Sales department of AcmeCorp.com?

Which of the following is a valid Active Directory designation for user John Doe in the Sales department of AcmeCorp.com?
A . Cn=john_doe,ou=Sales,ou=acmecorp,dc=com
B . Cn=john_doe,ou=Sales,ou=acme,ou=corp,dc=com
C . Cn=john_doe,dc=Sales,dc=acmecorp,dc=com
D . Cn=john_doe,ou=Sales,dc=acmecorp,dc=com

Answer: D