A customer notified a company that the customer's account did not reflect the most recent monthly payment. The company investigated the issue and determined that a clerk had mistakenly applied the customer's payments to a different customer's account. Which of the following controls would help to prevent such an error?
a. Checksum
b. Field check
c. Completeness test
d. Closed-loop verification

The correct answer is d. Closed-loop verification    

Explanation:

A CCTV or CCTV is an installation of connected equipment that generates an image circuit that can only be seen by a certain group of people, these are customized to adapt to the needs of each client whether they are oriented to security, surveillance or service improvement.

D) Closed-loop verification

Explanation:

In accounting processes, a closed loop verification process refers to checking that the input information is complete and has been registered properly to the corresponding accounts. It is very similar to a validity check process, only that it doesn't check the process itself, but the registered information instead.

Accounting records must always match and balance, the debits must equal the credits, so this process is used to verify that the input is introduced to the correct accounts.

answer; (a) searching for information can be done quickly;