Answer:
The answer is: C) Approving vendors’ invoices for payment.
Explanation:
Within an organization, the duties of authorizing payments, record keeping and asset custody have to be assigned to separate business units or departments. One single department shouldn't authorize payments and make them. There would be no possible control over what they are doing.
For example, if the treasury department is able to authorize payments, instead of paying $1,000 for an invoice they could pay $50,000 and no one would be able to discover the fraud committed.