Answer: the correct option is D.
Explanation: Segregation of Duties is the concept whereby more than one person required to complete a given task.
The segregation of duties concept acts to prohibit the assignment of responsibility to just one person for the purchasing of assets, their custody, and the related record keeping.
What this means is that when one person places an order to buy an asset, a different person will record the transaction in the accounting records.
What will happen by implementing this is that fraud is prevented by making sure that at least two individuals are responsible for the separate parts of any task.