What will print at the bottom of a printout if the duplicate test is not completed?

The correct answer indicates that if a duplicate test is not completed, the printout will show "Not a successfully completed test sequence." This is important as it conveys that the testing protocol was not adhered to, which could impact the reliability and validity of the results. In the context of alcohol testing procedures, completing both the original and the duplicate test is crucial for ensuring accurate measurements and to provide a secondary confirmation of the first test's result.

The phrase itself emphasizes the importance of proper procedure in the testing process and acts as a clear indicator for users that the test may not be considered valid for enforcement purposes. By ensuring that all necessary steps are taken, the integrity of the testing process can be maintained, thereby protecting both the subject being tested and the officials relying on those results.