Final answer:
The correct answer is A. Management has delegated the authority to make purchases under a certain value to subordinates.
Step-by-step explanation:
The correct answer is A. Management has delegated the authority to make purchases under a certain value to subordinates. This is not considered a red flag because it is a standard practice for management to delegate purchasing authority to subordinates for lower value purchases. It allows for more efficient decision making and reduces the burden on higher-level management.
On the other hand, B, C, and D are all considered red flags in terms of fraud prevention. B is a red flag because it violates the principle of segregation of duties, where one individual shouldn't have the sole responsibility for multiple aspects of handling marketable securities. C is a red flag because unclear responsibility and accountability can lead to misappropriation of funds in the accounts receivable department. D is a red flag because job rotation is an important control mechanism to prevent fraud, so an individual holding the same cash-handling job for an extended period increases the risk of fraud.