Which of the following is a disqualification in a Western Pleasure class?

In a Western Pleasure class, the focus is on the horse's movement, expression, and overall suitability for the discipline, as well as the rider's ability to effectively control their horse. A disqualification in such a class is considered a serious infraction of the rules that affects the integrity of the competition.

The illegal use of hands on the reins is a disqualification because it indicates a lack of control or a failure to properly execute the riding techniques expected in Western Pleasure. This improper handling can hinder the horse's performance and detracts from the class's goal of demonstrating a harmonious partnership between horse and rider. The rules are clear in promoting professionalism and safety, and improper rein handling does not align with these values.

The other options, such as proper attire, correct gait, and the use of a whip, relate to the standards and expectations within the class but do not constitute outright disqualifications under typical Western Pleasure rules. Proper attire is necessary but is more about presentation than disqualification. Similarly, a correct gait is essential for scoring but would not result in disqualification unless it were executed incorrectly, impacting overall performance. The use of a whip can be permissible under certain circumstances, provided it is used appropriately and in accordance with competition rules.