Answer:
4. Checklist
Explanation:
Option A is wrong because it requires character by character tests to validate the result.
Option B is wrong because the sales clerk has already posted all the data. Therefore, there is not necessary to test for missing data.
Option C is wrong because the Reasonableness test is doing for auditing purposes.
Option D is correct because it can compare one list with another. With the help of a checklist program, the number is compared to the last number entered to the clerk.