CISSP question

in SSCP
The ability of one person in the finance department to add vendors to the vendor database and subsequently pay the vendor violates which concept?
A.A well-formed transaction
B.Separation of duties
C.Least privilege
D.Sensitivity level
Which one and why?
A.A well-formed transaction
B.Separation of duties
C.Least privilege
D.Sensitivity level
Which one and why?
Comments
"Separation of duties ensures fraud or other undesirable behavior cannot occur without collusion between two or more parties"
Now, if your source has many of these little mistakes. Get rid of it. If this is just a single one-off then mark the answer correctly but there is no disagreement as to the intended answer should be: B.) Separation of Duties. One person adding vendors to a database. No one to authorize the addition. Same said person is also paying vendors from the same database. Really needs three people to complete this transaction. In audit this would be a lack of compensating control as well.
Never seen any study guide to be 100 percent correct and even occasionally on a test as well.
- b/eads