Which of the following clues would indicate failure in the walk and turn test?

Using arms for balance is an indicator of failure in the walk and turn test because it suggests a lack of coordination and balance, which are critical components of assessing a subject's sobriety. The walk and turn test is designed to evaluate a person's ability to follow instructions and maintain physical control while walking in a straight line. When a person uses their arms to help maintain balance, it typically signals that they are struggling to walk in a straight line or are unable to follow the test's instructions effectively. Proper performance would involve keeping the arms at the sides and focusing on the task without needing additional support.

In contrast, maintaining balance, walking on the line, and counting steps accurately are indicative of successfully completing the test. These elements reflect the test's intent to measure not just physical coordination but also the cognitive ability to follow directions carefully. If an individual demonstrates these skills, it suggests they are likely not impaired by alcohol or drugs.