Which of the following is true regarding adhesives on footwear?

When considering the regulations surrounding the use of adhesives on footwear in powerlifting competitions, it's important to refer to the governing rules that typically emphasize safety and fairness in the sport. In this context, only water is allowed because it is a neutral substance that does not alter the performance characteristics of the footwear.

Using only water as an adhesive prevents competitors from gaining an unfair advantage through substances that could change the grip or stability of the shoe. This restriction also helps to maintain uniformity among athletes, ensuring that competition is conducted on an equitable basis.

While other options suggest varying degrees of permissibility regarding adhesives, they do not align with the guidelines established for footwear integrity. Hence, the rules are structured to favor simplicity and fairness, allowing only water as an acceptable substance for use on shoes in competitions.