What clear instruction is given at the beginning of the One Leg Stand test?

In the One Leg Stand test, the clear instruction to "stand with feet together and arms at the side" is critical as it sets the foundation for the assessment of a subject's balance and coordination. This position allows the officer to observe how well the subject maintains stability without any assistance from their arms or altering the standing position. By having the individual keep their feet together and arms at their sides, the test ensures that the results are not influenced by extraneous movements or support, providing a more accurate measure of their physical and cognitive impairment due to alcohol consumption.

Other options, while they may play a role in aspects of sobriety tests, do not specifically establish the initial stance needed for the One Leg Stand, which is essential for the integrity of the test's outcomes.