"These restrictions exist even for "legal" drugs because all drugs have the potential to be abused or to cause unhealthy side effects or long-term damage. In the following slides, we'll discuss two general classes of "legal" drugs: those available by prescription only, and those available without a prescription. We'll then discuss inhalants, a particularly deadly type of legally available drugs. It's important to remember that while each drug is unique, even drugs provided by your doctor can be dangerous. Abuse, overdose, and chronic use of many legally available drugs can cause severe physical and mental damage."
This passage is an example of a
A) Definition
B) Comparison
C) Classification
D) Explanation