Which of the following is a clue tested in the Walk-and-Turn test?

Starting too soon is indeed a recognized clue tested during the Walk-and-Turn test. This test is designed to assess a person's ability to follow instructions and maintain balance, which can be impaired by alcohol impairment. If an individual begins the test before the officer has finished explaining the instructions, it demonstrates a lack of ability to follow directions—one of the indicators of potential impairment. This clue is important because it reflects not only physical control but also cognitive processing related to following commands accurately.

While other options may involve behaviors that could indicate impairment, they are not specifically recognized as official clues tested in the Walk-and-Turn. For example, taking too few steps or looking around may occur for various reasons unrelated to impairment, and walking with hands in pockets does not directly relate to the systematic execution of the test itself. The focus on starting too soon is significant because it specifically ties to the instructions necessary to perform the test correctly.