Answer: (D) Separation of the duties
Explanation:
According to the question, in her company their is a lack of separation of the duties between the employees. The separation of duties plays an important role in an organization as this concept basically control the process of segregation of the duties among all the members equally.
The separation of duties is also known as the segregation of the duties and it decrease the error and also prevent from the frauds.
Therefore, Option (D) is correct.