Substance use can be defined as which of the following?

Substance use encompasses a broad range of behaviors involving the consumption of various substances, including alcohol, tobacco, and illicit drugs. The definition of substance use covers not just the act of using these substances frequently or excessively, but also includes occasional use. Choice B accurately reflects this understanding by acknowledging that drinking, smoking, or using drugs can occur on an occasional basis, which is a common scenario for many individuals and aligns with how substance use is understood in many contexts, including health and social perspectives.

In contrast to the other options, this definition is more comprehensive, as it does not limit substance use to specific substances, quantities, or conditions such as being under medical supervision. Instead, it recognizes that substance use can vary widely among individuals and can include both recreational and situational consumption.