Which of the following is a common method of ingestion for CNS stimulants?

The correct answer identifies oral consumption, smoking, or injection as common methods of ingestion for central nervous system (CNS) stimulants. CNS stimulants, which include drugs like cocaine, amphetamines, and certain prescription medications for ADHD, can be administered in various ways, each method affecting the onset and intensity of the drug's effects.

Oral consumption involves taking the stimulant in pill form or as a powder mixed into food or drink, which allows for a slower release into the bloodstream. Smoking and injection provide more rapid effects because they deliver the drug directly into the bloodstream or lungs, leading to intense and immediate stimulation. This versatility in administration methods is a characteristic feature of many stimulants, making this option the most comprehensive.

Other methods listed, such as those involving transdermal patches, inhalation through the nose only, and infusion into beverages, are not typical or exclusive routes for CNS stimulants. For example, transdermal patches are more commonly associated with medications intended for longer-term management, rather than the rapid effects sought by users of stimulants. Similarly, while inhalation (snorting) is a method used to consume some CNS stimulants, specifying it as "through the nose only" limits the answer by excluding other common methods.