What materials can be used to adulterate drugs in the context of drug paraphernalia?

In the context of drug paraphernalia and the adulteration of drugs, substances like water and alcohol can indeed be used; therefore, the choice that includes both is accurate.

Water is commonly used to dilute drugs for various purposes, such as preparing injectable substances. Using water allows the user to alter the concentration of the drug, making it easier to consume or manipulate for effects. On the other hand, alcohol can also serve as a solvent for certain substances, facilitating a change in their form or increasing their potency, depending on how it is used.

The combination of both water and alcohol being recognized as potential adulterants highlights the versatility of substances that could be used in this context, as both can facilitate the alteration of drugs to achieve different effects or to assist in their consumption. Adulteration practices reflect a critical concern regarding health and safety, as they not only change the intended use of the drugs but can also introduce significant risks to users.